diff --git a/README.md b/README.md
index 81d09fc..a90389f 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,9 @@ Current extension functions:
 - [`varargsToList/glue`](https://github.com/robstoll/kbox/tree/main/src/commonMain/kotlin/ch/tutteli/kbox/varargToList.kt#L11)
   creates a `List` out of a single `E` and an `Array<E>`.
 
+- [takeIf](https://github.com/robstoll/kbox/tree/main/src/commonMain/kotlin/ch/tutteli/kbox/takeIf.kt#L12) 
+  same behaviour as `takeIf` but as prefix operator and not postfix.
+
 Moreover, the following function might come in handy for you as well:
 - [identity](https://github.com/robstoll/kbox/tree/main/src/commonMain/kotlin/ch/tutteli/kbox/identity.kt)
 
diff --git a/src/commonMain/kotlin/ch/tutteli/kbox/takeIf.kt b/src/commonMain/kotlin/ch/tutteli/kbox/takeIf.kt
new file mode 100644
index 0000000..8252cd6
--- /dev/null
+++ b/src/commonMain/kotlin/ch/tutteli/kbox/takeIf.kt
@@ -0,0 +1,12 @@
+package ch.tutteli.kbox
+
+/**
+ * Calls the [provider] only if the [predicate] holds, returns `null` otherwise.
+ *
+ * This function shall complement `takeIf` from the stdlib of Kotlin for cases where the cost to call the provider
+ * is high or the code involved to define the provider is long and a postfix `takeIf` is less readable
+ * than stating it at the beginning.
+ *
+ * @since 1.0.0
+ */
+inline fun <R> takeIf(predicate: Boolean, provider: () -> R): R? = if (predicate) provider() else null
diff --git a/src/commonTest/kotlin/ch/tutteli/kbox/TakeIfSpec.kt b/src/commonTest/kotlin/ch/tutteli/kbox/TakeIfSpec.kt
new file mode 100644
index 0000000..2423b5b
--- /dev/null
+++ b/src/commonTest/kotlin/ch/tutteli/kbox/TakeIfSpec.kt
@@ -0,0 +1,21 @@
+package ch.tutteli.kbox
+
+import ch.tutteli.atrium.api.fluent.en_GB.toEqual
+import ch.tutteli.kbox.atrium.expect
+import org.spekframework.spek2.Spek
+import org.spekframework.spek2.style.specification.describe
+
+object TakeIfSpec : Spek({
+
+    describe("fun ${::takeIf.name}}") {
+        it("it returns null if predicate doesn't hold") {
+            expect(
+                takeIf<Int>(false) { throw IllegalArgumentException("bla") }
+            ).toEqual(null)
+        }
+
+        it("it returns null if predicate doesn't hold") {
+            expect(takeIf(true) { 1 }).toEqual(1)
+        }
+    }
+})