diff --git a/BUILD.gn b/BUILD.gn
index 9107609..aceab6e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -24,7 +24,7 @@
   ]
   sources = [
     "modp_b64.cc",
-    "modp_b64.h",
+    "modp_b64/modp_b64.h",
     "modp_b64_data.h",
   ]
   include_dirs = [