diff --git a/reactos/win32ss/user/user32/windows/font.c b/reactos/win32ss/user/user32/windows/font.c
index bcbd2424017..96b50d85b0c 100644
--- a/reactos/win32ss/user/user32/windows/font.c
+++ b/reactos/win32ss/user/user32/windows/font.c
@@ -218,9 +218,12 @@ GetTabbedTextExtentA(
 {
     LONG ret;
     UINT cp = GdiGetCodePage( hDC ); // CP_ACP
-    DWORD len = MultiByteToWideChar(cp, 0, lpString, nCount, NULL, 0);
+    DWORD len;
+    LPWSTR strW;
+
+    len = MultiByteToWideChar(cp, 0, lpString, nCount, NULL, 0);
     if (!len) return 0;
-    LPWSTR strW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
+    strW = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR));
     if (!strW) return 0;
     MultiByteToWideChar(cp, 0, lpString, nCount, strW, len);
     ret = GetTabbedTextExtentW(hDC, strW, len, nTabPositions, lpnTabStopPositions);