diff --git a/rdesktop.c b/rdesktop.c
index be7ad0a..0da09b9 100644
--- a/rdesktop.c
+++ b/rdesktop.c
@@ -569,7 +569,11 @@ main(int argc, char *argv[])
 #endif
 
 							if (strncmp("off", optarg, 3) == 0)
+#ifdef WITH_RDPSND
 								g_rdpsnd = False;
+#else
+								warning("Not compiled with sound support");
+#endif
 
 							optarg = p;
 						}