diff --git a/src/proxymain.c b/src/proxymain.c
index 95f8b1c..55a382d 100644
--- a/src/proxymain.c
+++ b/src/proxymain.c
@@ -677,7 +677,7 @@ int MODULEMAINFUNC (int argc, char** argv){
 #endif
 #if defined SO_BINDTODEVICE
 		if(srv.ibindtodevice && srv.so._setsockopt(srv.so.state, sock, SOL_SOCKET, SO_BINDTODEVICE, srv.ibindtodevice, strlen(srv.ibindtodevice) + 1)) {
-		    dolog(&defparam, "failed to bind device");
+		    dolog(&defparam, (unsigned char *)"failed to bind device");
 		    return -12;
 		}
 #elif defined IP_BOUND_IF