diff --git a/linux/libdriver/base/abi.c b/linux/libdriver/base/abi.c
index 8efceedb..9c2dc78d 100644
--- a/linux/libdriver/base/abi.c
+++ b/linux/libdriver/base/abi.c
@@ -2,7 +2,7 @@
 #include <string.h>
 #include "abi.h"
 
-uintptr_t align(uintptr_t p, size_t a)
+static uintptr_t align(uintptr_t p, size_t a)
 {
 	return (p + (a-1)) & ~(a-1);
 }