diff --git a/src/corelib/tools/qbytearraymatcher.h b/src/corelib/tools/qbytearraymatcher.h
index e3ab25c152..c1c0c3a660 100644
--- a/src/corelib/tools/qbytearraymatcher.h
+++ b/src/corelib/tools/qbytearraymatcher.h
@@ -85,6 +85,7 @@ private:
 
 class QStaticByteArrayMatcherBase
 {
+    Q_DECL_ALIGN(16)
     struct Skiptable {
         uchar data[256];
     } m_skiptable;