diff --git a/include/asm-x86/unistd_64.h b/include/asm-x86/unistd_64.h
index 3883ceb54ef5..fe26e36d0f51 100644
--- a/include/asm-x86/unistd_64.h
+++ b/include/asm-x86/unistd_64.h
@@ -2,7 +2,7 @@
 #define _ASM_X86_64_UNISTD_H_
 
 #ifndef __SYSCALL
-#define __SYSCALL(a,b)
+#define __SYSCALL(a, b)
 #endif
 
 /*