diff --git a/libafl_qemu/libqasan/libqasan.c b/libafl_qemu/libqasan/libqasan.c
index 5d6397a4a7..b91dd0f212 100644
--- a/libafl_qemu/libqasan/libqasan.c
+++ b/libafl_qemu/libqasan/libqasan.c
@@ -361,6 +361,7 @@ void qasan_dealloc(const char *start) {
 int qasan_swap(int state) {
   QASAN_DEBUG("SWAP: %d\n", state);
   /* Do Nothing */
+  return 0;
 }
 #endif