diff --git a/scripts/mkimage.c b/scripts/mkimage.c
index c7267a2..891d7b6 100644
--- a/scripts/mkimage.c
+++ b/scripts/mkimage.c
@@ -150,7 +150,7 @@
 
 static inline void image_set_name(image_header_t *hdr, const char *name)
 {
-	strncpy(image_get_name(hdr), name, IH_NMLEN);
+	strncpy(image_get_name(hdr), name, IH_NMLEN - 1);
 }
 
 /**