diff --git a/eo-runtime/src/main/java/org/eolang/AtComposite.java b/eo-runtime/src/main/java/org/eolang/AtComposite.java
index f71b273363..339d460c47 100644
--- a/eo-runtime/src/main/java/org/eolang/AtComposite.java
+++ b/eo-runtime/src/main/java/org/eolang/AtComposite.java
@@ -65,9 +65,14 @@ public Phi get() {
     }
 
     @Override
-    public void put(final int pos, final Phi phi) {
+    public void put(final Phi phi) {
         throw new ExReadOnly(
             "Can't overwrite lambda expression"
         );
     }
+
+    @Override
+    public void put(final int pos, final Phi src) {
+        this.put(src);
+    }
 }
diff --git a/eo-runtime/src/main/java/org/eolang/AtLogged.java b/eo-runtime/src/main/java/org/eolang/AtLogged.java
index 4dda88cfa9..0c4fb05195 100644
--- a/eo-runtime/src/main/java/org/eolang/AtLogged.java
+++ b/eo-runtime/src/main/java/org/eolang/AtLogged.java
@@ -87,9 +87,14 @@ public Phi get() {
     }
 
     @Override
-    public void put(final int pos, final Phi src) {
+    public void put(final Phi src) {
         this.log.info(String.format("  %s.put()...\n", this.owner));
-        this.origin.put(pos, src);
+        this.origin.put(src);
         this.log.info(String.format("  %s.put()!\n", this.owner));
     }
+
+    @Override
+    public void put(final int pos, final Phi src) {
+        this.put(src);
+    }
 }
diff --git a/eo-runtime/src/main/java/org/eolang/AtOnce.java b/eo-runtime/src/main/java/org/eolang/AtOnce.java
index d130229aaf..5f033c2ba8 100644
--- a/eo-runtime/src/main/java/org/eolang/AtOnce.java
+++ b/eo-runtime/src/main/java/org/eolang/AtOnce.java
@@ -70,7 +70,7 @@ public Phi get() {
     }
 
     @Override
-    public void put(final int pos, final Phi phi) {
+    public void put(final Phi phi) {
         throw new ExReadOnly(
             String.format(
                 "Can't overwrite the \"%s\" attribute",
@@ -78,4 +78,14 @@ public void put(final int pos, final Phi phi) {
             )
         );
     }
+
+    @Override
+    public void put(final int pos, final Phi phi) {
+        throw new ExReadOnly(
+            String.format(
+                "There are no void attributes left, can't set the %s one",
+                pos
+            )
+        );
+    }
 }
diff --git a/eo-runtime/src/main/java/org/eolang/AtRho.java b/eo-runtime/src/main/java/org/eolang/AtRho.java
index dbcf229c54..7c61af042a 100644
--- a/eo-runtime/src/main/java/org/eolang/AtRho.java
+++ b/eo-runtime/src/main/java/org/eolang/AtRho.java
@@ -70,9 +70,14 @@ public Phi get() {
     }
 
     @Override
-    public void put(final int pos, final Phi phi) {
+    public void put(final Phi phi) {
         if (this.rho.get() == null) {
             this.rho.set(phi);
         }
     }
+
+    @Override
+    public void put(final int pos, final Phi src) {
+        this.put(src);
+    }
 }
diff --git a/eo-runtime/src/main/java/org/eolang/AtVoid.java b/eo-runtime/src/main/java/org/eolang/AtVoid.java
index 4cf0ddc9ca..7951e5c794 100644
--- a/eo-runtime/src/main/java/org/eolang/AtVoid.java
+++ b/eo-runtime/src/main/java/org/eolang/AtVoid.java
@@ -89,7 +89,7 @@ public Phi get() {
     }
 
     @Override
-    public void put(final int pos, final Phi phi) {
+    public void put(final Phi phi) {
         if (this.object.get() == null) {
             this.object.set(phi);
         } else {
@@ -101,4 +101,9 @@ public void put(final int pos, final Phi phi) {
             );
         }
     }
+
+    @Override
+    public void put(final int pos, final Phi phi) {
+        this.put(phi);
+    }
 }
diff --git a/eo-runtime/src/main/java/org/eolang/AtWithRho.java b/eo-runtime/src/main/java/org/eolang/AtWithRho.java
index 1d9d50dae1..a04540a6bc 100644
--- a/eo-runtime/src/main/java/org/eolang/AtWithRho.java
+++ b/eo-runtime/src/main/java/org/eolang/AtWithRho.java
@@ -67,6 +67,11 @@ public Phi get() {
         return ret;
     }
 
+    @Override
+    public void put(final Phi phi) {
+        this.origin.put(phi);
+    }
+
     @Override
     public void put(final int pos, final Phi phi) {
         this.origin.put(pos, phi);
diff --git a/eo-runtime/src/main/java/org/eolang/Attr.java b/eo-runtime/src/main/java/org/eolang/Attr.java
index a95969025d..886641b0e1 100644
--- a/eo-runtime/src/main/java/org/eolang/Attr.java
+++ b/eo-runtime/src/main/java/org/eolang/Attr.java
@@ -65,7 +65,14 @@ public interface Attr {
     /**
      * Put a new object in.
      *
-     * @param pos The position
+     * @param phi The object to put
+     */
+    void put(Phi phi);
+
+    /**
+     * Put a new object with position of the attribute in.
+     *
+     * @param pos The position of the attribute
      * @param phi The object to put
      */
     void put(int pos, Phi phi);
diff --git a/eo-runtime/src/main/java/org/eolang/PhDefault.java b/eo-runtime/src/main/java/org/eolang/PhDefault.java
index f176a036da..eb14b33737 100644
--- a/eo-runtime/src/main/java/org/eolang/PhDefault.java
+++ b/eo-runtime/src/main/java/org/eolang/PhDefault.java
@@ -140,24 +140,12 @@ public boolean hasRho() {
 
     @Override
     public void put(final int pos, final Phi object) {
-        this.attrObject(this.attr(pos), object).put(pos, object);
+        this.attribute(this.attr(pos), object).put(pos, object);
     }
 
     @Override
     public void put(final String name, final Phi object) {
-        this.attrObject(name, object).put(0, object);
-    }
-
-    private Attr attrObject(final String name, final Phi object) {
-        if (!this.attrs.containsKey(name)) {
-            throw new ExUnset(
-                String.format(
-                    "Can't #put(\"%s\", %s) to %s, because the attribute is absent",
-                    name, object, this
-                )
-            );
-        }
-        return this.attrs.get(name);
+        this.attribute(name, object).put(object);
     }
 
     @Override
@@ -259,6 +247,24 @@ public final void add(final String name, final Attr attr) {
         this.attrs.put(name, new AtWithRho(attr, this));
     }
 
+    /**
+     * Get an attribute by name.
+     * @param name The name
+     * @param object The object
+     * @return The attribute
+     */
+    private Attr attribute(final String name, final Phi object) {
+        if (!this.attrs.containsKey(name)) {
+            throw new ExUnset(
+                String.format(
+                    "Can't #put(\"%s\", %s) to %s, because the attribute is absent",
+                    name, object, this
+                )
+            );
+        }
+        return this.attrs.get(name);
+    }
+
     /**
      * Get attribute name by position.
      * @param pos Position of the attribute
diff --git a/eo-runtime/src/test/java/org/eolang/AtEnvelope.java b/eo-runtime/src/test/java/org/eolang/AtEnvelope.java
index 7d15ae8948..9ede2b7d5a 100644
--- a/eo-runtime/src/test/java/org/eolang/AtEnvelope.java
+++ b/eo-runtime/src/test/java/org/eolang/AtEnvelope.java
@@ -55,6 +55,11 @@ public Phi get() {
         return this.origin.get();
     }
 
+    @Override
+    public void put(final Phi phi) {
+        this.origin.put(phi);
+    }
+
     @Override
     public void put(final int pos, final Phi phi) {
         this.origin.put(pos, phi);
diff --git a/eo-runtime/src/test/java/org/eolang/PhDefaultTest.java b/eo-runtime/src/test/java/org/eolang/PhDefaultTest.java
index ba6686591e..8056f89ca2 100644
--- a/eo-runtime/src/test/java/org/eolang/PhDefaultTest.java
+++ b/eo-runtime/src/test/java/org/eolang/PhDefaultTest.java
@@ -501,7 +501,7 @@ void failsCorrectlyWhenTooManyAttributesPut() {
             Matchers.equalTo("There are no void attributes left, can't set the 1st one")
         );
     }
-    
+
     /**
      * Rnd.
      * @since 0.1.0