diff --git a/src/frontend/inpcom.c b/src/frontend/inpcom.c
index ff9bb8072..86d2534f7 100644
--- a/src/frontend/inpcom.c
+++ b/src/frontend/inpcom.c
@@ -9867,6 +9867,10 @@ char* get_windows_canonical_path(const char* input_path) {
         return NULL;
     }
 
+    /* If plain filename, just copy it. */
+    if (!strchr(input_path, '\\') && !strchr(input_path, '/'))
+        return copy(input_path);
+
     inputLenMB = (int)strlen(input_path);
 
     if (inputLenMB == 0) {