1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/main.c b/Modules/main.c
index 5b4a7e2e64..5d1d8964bf 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -616,7 +616,7 @@ Py_Main(int argc, wchar_t **argv)
        script. */
     if ((p = Py_GETENV("PYTHONEXECUTABLE")) && *p != '\0') {
         wchar_t* buffer;
-        size_t len = strlen(p);
+        size_t len = strlen(p) + 1;
         size_t r;
 
         buffer = malloc(len * sizeof(wchar_t));