diff --git a/miner.h b/miner.h
index 13f4960c..a234ecd3 100644
--- a/miner.h
+++ b/miner.h
@@ -352,7 +352,7 @@ struct cgpu_info {
 	int threads;
 	struct thr_info **thr;
 
-	unsigned int max_hashes;
+	int64_t max_hashes;
 
 	const char *kname;
 #ifdef HAVE_OPENCL