diff --git a/infra/base-images/base-builder/compile_afl b/infra/base-images/base-builder/compile_afl
index c9537afc1..27a8d55d1 100644
--- a/infra/base-images/base-builder/compile_afl
+++ b/infra/base-images/base-builder/compile_afl
@@ -18,7 +18,7 @@
 echo -n "Compiling afl to $LIB_FUZZING_ENGINE ..."
 
 # afl needs its special coverage flags
-export COVERAGE_FLAGS="-fsanitize-coverage=trace-pc"
+export COVERAGE_FLAGS="-fsanitize-coverage=trace-pc-guard"
 export SANITIZER_FLAGS=""
 
 mkdir -p $WORK/afl