diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index 9e5a16093e5..930252dad3f 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -47,13 +47,6 @@ inline void qt_noop(void) {}
 #include <QtCore/qassert.h>
 #include <QtCore/qtypes.h>
 
-#if defined (__ELF__)
-#  define Q_OF_ELF
-#endif
-#if defined (__MACH__) && defined (__APPLE__)
-#  define Q_OF_MACH_O
-#endif
-
 /*
    Avoid "unused parameter" warnings
 */
diff --git a/src/corelib/global/qsystemdetection.h b/src/corelib/global/qsystemdetection.h
index a4cc20b5400..b3e13e3c99b 100644
--- a/src/corelib/global/qsystemdetection.h
+++ b/src/corelib/global/qsystemdetection.h
@@ -253,4 +253,11 @@
 #endif
 #endif
 
+#if defined (__ELF__)
+#  define Q_OF_ELF
+#endif
+#if defined (__MACH__) && defined (__APPLE__)
+#  define Q_OF_MACH_O
+#endif
+
 #endif // QSYSTEMDETECTION_H