diff --git a/include/linux/mm.h b/include/linux/mm.h
index df08551..24c3956 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -288,7 +288,7 @@ static inline int is_vmalloc_addr(const void *x)
 #ifdef CONFIG_MMU
 extern int is_vmalloc_or_module_addr(const void *x);
 #else
-static int is_vmalloc_or_module_addr(const void *x)
+static inline int is_vmalloc_or_module_addr(const void *x)
 {
 	return 0;
 }