diff --git a/src/lib/Log.c b/src/lib/Log.c
index 78ef485..7ffe5ef 100644
--- a/src/lib/Log.c
+++ b/src/lib/Log.c
@@ -171,7 +171,7 @@ int vfprintf(FILE *file, const char *format, va_list args) {
     DeepState_LogVFormat(DeepState_LogInfo, format, args);
   } else {
     if (!DeepState_UsingLibFuzzer) {
-      if (strstr(format, "INFO: ") == format) {
+      if (strstr(format, "INFO: ") != NULL) {
 	// Assume such a string to an nonstd target is libFuzzer
 	DeepState_LogVFormat(DeepState_LogFuzzer, format, args);
       } else {