diff --git a/app/perfdata.h b/app/perfdata.h
index a2946bb..572cce7 100644
--- a/app/perfdata.h
+++ b/app/perfdata.h
@@ -660,7 +660,7 @@ public slots:
     QByteArray m_decompressBuffer;
     QByteArray m_compressedBuffer;
     int m_remaininingDecompressedDataSize = 0;
-#if HAVE_ZSTD
+#ifdef HAVE_ZSTD
     ZSTD_DStream *m_zstdDstream = nullptr;
 #endif