diff --git a/include/sudo_util.h b/include/sudo_util.h
index f59cd9899..cafbe62db 100644
--- a/include/sudo_util.h
+++ b/include/sudo_util.h
@@ -242,7 +242,7 @@ sudo_dso_public int sudo_mmap_protect_v1(void *ptr);
 #define sudo_mmap_protect(_a) sudo_mmap_protect_v1(_a)
 
 /* multiarch.c */
-sudo_dso_public char *sudo_stat_multiarch_v1(const char *path, struct stat *sb);
+sudo_dso_public char *sudo_stat_multiarch_v1(const char * restrict path, struct stat * restrict sb);
 #define sudo_stat_multiarch(_a, _b) sudo_stat_multiarch_v1((_a), (_b))
 
 /* parseln.c */
diff --git a/lib/util/multiarch.c b/lib/util/multiarch.c
index 0b79de590..907a99cc7 100644
--- a/lib/util/multiarch.c
+++ b/lib/util/multiarch.c
@@ -44,7 +44,7 @@
  * Returns a dynamically allocated string on success and NULL on failure.
  */
 char *
-sudo_stat_multiarch_v1(const char *path, struct stat *sb)
+sudo_stat_multiarch_v1(const char * restrict path, struct stat * restrict sb)
 {
 #  if defined(__ILP32__)
     const char *libdirs[] = { "/libx32/", "/lib/", "/libexec/", NULL };
@@ -96,7 +96,7 @@ sudo_stat_multiarch_v1(const char *path, struct stat *sb)
 }
 #else
 char *
-sudo_stat_multiarch_v1(const char *path, struct stat *sb)
+sudo_stat_multiarch_v1(const char * restrict path, struct stat * restrict sb)
 {
     return NULL;
 }