diff --git a/lib/libfdt/fdt_ro.c b/lib/libfdt/fdt_ro.c
index f2154e8370272eeac529644e80a19923902a7265..36af0435254b47cb0d2599836d1c81638266adf8 100644
--- a/lib/libfdt/fdt_ro.c
+++ b/lib/libfdt/fdt_ro.c
@@ -44,7 +44,7 @@ static int _fdt_string_eq(const void *fdt, int stroffset,
 {
 	const char *p = fdt_string(fdt, stroffset);
 
-	return (strlen(p) == len) && (memcmp(p, s, len) == 0);
+	return (strnlen(p, len + 1) == len) && (memcmp(p, s, len) == 0);
 }
 
 int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)