diff --git a/fuzzers/mopt/builder.Dockerfile b/fuzzers/mopt/builder.Dockerfile
index afd22521e..d3a094752 100644
--- a/fuzzers/mopt/builder.Dockerfile
+++ b/fuzzers/mopt/builder.Dockerfile
@@ -18,7 +18,7 @@ FROM $parent_image
 # Set AFL_NO_X86 to skip flaky tests.
 RUN git clone https://github.com/puppet-meteor/MOpt-AFL /afl && \
     cd /afl && \
-    git checkout 45b9f38d2d8b699fd571cfde1bf974974339a21e && \
+    git checkout a9a5dc5c0c291c1cdb09b2b7b27d7cbf1db7ce7b && \
     cd MOpt && AFL_NO_X86=1 make && \
     cp afl-fuzz ..