Index: /trunk/src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp	(revision 43577)
+++ /trunk/src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp	(revision 43578)
@@ -39,4 +39,7 @@
 #include <iprt/assert.h>
 #include <iprt/asm.h>
+#ifdef RT_STRICT
+# include <iprt/asm-amd64-x86.h>
+#endif
 
 #include "internal/magics.h"