diff --git a/src/corelib/CMakeLists.txt b/src/corelib/CMakeLists.txt
index ffd22d6884..89abd8d863 100644
--- a/src/corelib/CMakeLists.txt
+++ b/src/corelib/CMakeLists.txt
@@ -287,6 +287,7 @@ _qt_internal_setup_deploy_support()
 
 set(corelib_no_pch_sources
     compat/removed_api.cpp
+    global/qsimd.cpp
 )
 
 foreach(src ${corelib_no_pch_sources})
diff --git a/src/corelib/global/qsimd.cpp b/src/corelib/global/qsimd.cpp
index d2a0686097..fea25a73d7 100644
--- a/src/corelib/global/qsimd.cpp
+++ b/src/corelib/global/qsimd.cpp
@@ -40,6 +40,7 @@
 
 // we need ICC to define the prototype for _rdseed64_step
 #define __INTEL_COMPILER_USE_INTRINSIC_PROTOTYPES
+#undef _FORTIFY_SOURCE      // otherwise, the always_inline from stdio.h fail to inline
 
 #include "qsimd_p.h"
 #include "qalgorithms.h"