diff --git a/llvm/lib/Fuzzer/FuzzerTracePC.cpp b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
index 7e7a914..781bd56 100644
--- a/llvm/lib/Fuzzer/FuzzerTracePC.cpp
+++ b/llvm/lib/Fuzzer/FuzzerTracePC.cpp
@@ -218,6 +218,9 @@
   TPC.HandleValueProfile((PC & 4095) | (Idx << 12));
 }
 
+#ifdef __clang__  // avoid gcc warning.
+__attribute__((no_sanitize("memory")))
+#endif
 void TracePC::AddValueForStrcmp(void *caller_pc, const char *s1, const char *s2,
                               size_t n) {
   if (!n) return;