diff --git a/tools/mkenvimage.c b/tools/mkenvimage.c
index bfc4eb636b661affde52e3a1a5422b9b02bc7fc5..55212687e17d0162790002c1c3e5fffbfccb45ca 100644
--- a/tools/mkenvimage.c
+++ b/tools/mkenvimage.c
@@ -35,6 +35,7 @@
 #include <stdint.h>
 #include <string.h>
 #include <unistd.h>
+#include <libgen.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mman.h>