diff --git a/dlls/msvcirt/msvcirt.c b/dlls/msvcirt/msvcirt.c
index a4986625321..924e84c7307 100644
--- a/dlls/msvcirt/msvcirt.c
+++ b/dlls/msvcirt/msvcirt.c
@@ -68,7 +68,7 @@ void * __stdcall MSVCIRT_operator_sl_int(class_ostream * _this, int integer)
 DEFINE_THISCALL_WRAPPER(MSVCIRT_operator_sl_pchar,8)
 void * __stdcall MSVCIRT_operator_sl_pchar(class_ostream * _this, const char * string)
 {
-   FIXME("(%p)->(%s) stub\n", _this, string);
+   FIXME("(%p)->(%s) stub\n", _this, debugstr_a(string));
    return _this;
 }