diff --git a/expat/qa.sh b/expat/qa.sh
index ae276468..2a77f2c3 100755
--- a/expat/qa.sh
+++ b/expat/qa.sh
@@ -55,7 +55,7 @@ main() {
         ;;
     memory)
         # http://clang.llvm.org/docs/MemorySanitizer.html
-        BASE_COMPILE_FLAGS+=" -fsanitize=memory -fno-omit-frame-pointer -g -O2 -fsanitize-memory-track-origins -fsanitize-blacklist=memory-sanitizer-blacklist.txt"
+        BASE_COMPILE_FLAGS+=" -fsanitize=memory -fno-omit-frame-pointer -g -O2 -fsanitize-memory-track-origins -fsanitize-blacklist=$PWD/memory-sanitizer-blacklist.txt"
         ;;
     ncc)
         # http://students.ceid.upatras.gr/~sxanth/ncc/