Make it build.
diff --git a/apps/s_server.c b/apps/s_server.c
index d3b2d4a..cf40da5 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -3598,7 +3598,7 @@
 			return 1;
 			}
 		}
-	//no auth extension to send
+	/* no auth extension to send */
 	return -1;
 	}
 
@@ -3631,7 +3631,7 @@
 			return 1;
 			}
 		}
-	//no supplemental data to send
+	/* no supplemental data to send */
 	return -1;
 	}
 #endif