diff --git a/quartz/src/main/c/secp256k1/jni_bridge.c b/quartz/src/main/c/secp256k1/jni_bridge.c
index 80337b257..38a67a29a 100644
--- a/quartz/src/main/c/secp256k1/jni_bridge.c
+++ b/quartz/src/main/c/secp256k1/jni_bridge.c
@@ -8,6 +8,7 @@
  */
 #include <jni.h>
 #include "secp256k1_c.h"
+#include "sha256.h"
 #include <string.h>
 #include <stdlib.h>