diff --git a/tools/mkenvimage.c b/tools/mkenvimage.c
index bfc4eb636b..55212687e1 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>