diff --git a/dlls/shell32/autocomplete.c b/dlls/shell32/autocomplete.c
index af450ba2f17..fa807138a31 100644
--- a/dlls/shell32/autocomplete.c
+++ b/dlls/shell32/autocomplete.c
@@ -589,7 +589,7 @@ static LRESULT APIENTRY ACEditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam,
 		if (hr != S_OK)
 		    break;
 
-		if (strstrW(strs, hwndText) == strs) {
+		if (StrStrIW(strs, hwndText) == strs) {
                     if (!filled && (This->options & ACO_AUTOAPPEND)) {
 			SetWindowTextW(hwnd, strs);
 			SendMessageW(hwnd, EM_SETSEL, lstrlenW(hwndText), lstrlenW(strs));