diff --git a/compiler-rt/lib/scudo/standalone/primary64.h b/compiler-rt/lib/scudo/standalone/primary64.h
index 747b1a2233d32..c2401c86671d0 100644
--- a/compiler-rt/lib/scudo/standalone/primary64.h
+++ b/compiler-rt/lib/scudo/standalone/primary64.h
@@ -1394,7 +1394,7 @@ uptr SizeClassAllocator64<Config>::releaseToOSMaybe(RegionInfo *Region,
                                             Region->FreeListInfo.PushedBlocks) *
                                                BlockSize;
     if (UNLIKELY(BytesInFreeList == 0))
-      return false;
+      return 0;
 
     // ==================================================================== //
     // 1. Check if we have enough free blocks and if it's worth doing a page