diff --git a/main.cpp b/main.cpp
index 4ce164bf..b29a9f0f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -380,7 +380,7 @@ int main(int Argc, char *Argv[]) {
             }
             outFileName = argv[i];
         }
-        else if (!strcmp(argv[i], "--outfile="))
+        else if (!strncmp(argv[i], "--outfile=", 10))
             outFileName = argv[i] + strlen("--outfile=");
         else if (!strcmp(argv[i], "-h")) {
             if (++i == argc) {