diff --git a/pimd/pim_sock.c b/pimd/pim_sock.c
index b80c0a2..4816c56 100644
--- a/pimd/pim_sock.c
+++ b/pimd/pim_sock.c
@@ -249,7 +249,7 @@
   return 0;
 }
 
-int pim_socket_recvfromto(int fd, char *buf, size_t len,
+int pim_socket_recvfromto(int fd, uint8_t *buf, size_t len,
 			  struct sockaddr_in *from, socklen_t *fromlen,
 			  struct sockaddr_in *to, socklen_t *tolen,
 			  int *ifindex)