diff --git a/library/sha4.c b/library/sha4.c
index 6361a54..556cc4f 100644
--- a/library/sha4.c
+++ b/library/sha4.c
@@ -152,7 +152,7 @@
     ctx->is384 = is384;
 }
 
-static void sha4_process( sha4_context *ctx, const unsigned char data[128] )
+void sha4_process( sha4_context *ctx, const unsigned char data[128] )
 {
     int i;
     uint64_t temp1, temp2, W[80];