diff --git a/dlls/jscript/regexp.c b/dlls/jscript/regexp.c
index ff9807b5576..05b606210ea 100644
--- a/dlls/jscript/regexp.c
+++ b/dlls/jscript/regexp.c
@@ -3642,6 +3642,9 @@ static HRESULT run_exec(script_ctx_t *ctx, vdisp_t *jsthis, VARIANT *arg, jsexce
         SysFreeString(string);
         set_last_index(regexp, 0);
         *ret = VARIANT_FALSE;
+        if(input) {
+            *input = NULL;
+        }
         return S_OK;
     }