diff --git a/lib/libc/include/block_abi.h b/lib/libc/include/block_abi.h
index 7d1e72892421..b0d6e5723937 100644
--- a/lib/libc/include/block_abi.h
+++ b/lib/libc/include/block_abi.h
@@ -60,4 +60,4 @@
 		int flags;\
 		int reserved;\
 		void (*invoke)(void *, ...);\
-	}*)x)->invoke)
+	}*)(void*)x)->invoke)