diff --git a/doxygen-1.9.1-crash_in_docparser.patch b/doxygen-1.9.1-crash_in_docparser.patch
index f1308fa..adcd144 100644
--- a/doxygen-1.9.1-crash_in_docparser.patch
+++ b/doxygen-1.9.1-crash_in_docparser.patch
@@ -6,7 +6,7 @@ diff -up doxygen-1.9.1/src/docparser.cpp.me doxygen-1.9.1/src/docparser.cpp
        g_initialStyleStack.push(sc);
        g_styleStack.pop();
 -      sc = g_styleStack.top();
-+      sc = !g_styleStack.empty() ? g_styleStack.top() : 0;
++      sc = !g_styleStack.isEmpty() ? g_styleStack.top() : 0;
      }
    }
  }