diff --git a/include/asm-s390/kexec.h b/include/asm-s390/kexec.h
index ce28ddda0f507266a10e297844e7500d73ff290d..9c35c8ad1afd63ab8b8519a9594cc813f62fa9fd 100644
--- a/include/asm-s390/kexec.h
+++ b/include/asm-s390/kexec.h
@@ -26,7 +26,7 @@
 
 /* Maximum address we can use for the control pages */
 /* Not more than 2GB */
-#define KEXEC_CONTROL_MEMORY_LIMIT (1<<31)
+#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
 
 /* Allocate one page for the pdp and the second for the code */
 #define KEXEC_CONTROL_CODE_SIZE 4096