diff --git a/openbsd-compat/bsd-misc.c b/openbsd-compat/bsd-misc.c
index 059b6d3b3..d9c9b2671 100644
--- a/openbsd-compat/bsd-misc.c
+++ b/openbsd-compat/bsd-misc.c
@@ -107,7 +107,7 @@ const char *strerror(int e)
 #endif
 
 #ifndef HAVE_UTIMES
-int utimes(char *filename, struct timeval *tvp)
+int utimes(const char *filename, struct timeval *tvp)
 {
 	struct utimbuf ub;
 
diff --git a/openbsd-compat/bsd-misc.h b/openbsd-compat/bsd-misc.h
index 2206e1a82..61ead1b7f 100644
--- a/openbsd-compat/bsd-misc.h
+++ b/openbsd-compat/bsd-misc.h
@@ -62,7 +62,7 @@ struct timeval {
 }
 #endif /* HAVE_STRUCT_TIMEVAL */
 
-int utimes(char *, struct timeval *);
+int utimes(const char *, struct timeval *);
 #endif /* HAVE_UTIMES */
 
 #ifndef AT_FDCWD