diff --git a/kokoro/ubuntu/build.sh b/kokoro/ubuntu/build.sh
index f15971a..45f5d51 100755
--- a/kokoro/ubuntu/build.sh
+++ b/kokoro/ubuntu/build.sh
@@ -30,7 +30,7 @@
 # TODO: add a gcc-4.9 or above prebuilt to check the gcc build too?
 # Check the build works.
 make
-#TODO: static analysis with make check
+make check
 
 #
 # Step 2: make sure it works.
diff --git a/src/fdt.c b/src/fdt.c
index 599fca4..d7d1aad 100644
--- a/src/fdt.c
+++ b/src/fdt.c
@@ -322,7 +322,10 @@
 	struct fdt_node node;
 
 	/* Traverse the whole thing. */
-	fdt_root_node(&node, hdr);
+	if (!fdt_root_node(&node, hdr)) {
+		dlog("FDT failed validation.\n");
+		return;
+	}
 
 	fdt_tokenizer_init(&t, node.strs, node.begin, node.end);