diff --git a/src/signal_handler.c b/src/signal_handler.c
index e006be2ce07e9ea5c3be6d4158e70d48cdd0f5a5..cecfcec766e8ab2ebb37eedded8a22602e084da5 100644
--- a/src/signal_handler.c
+++ b/src/signal_handler.c
@@ -311,9 +311,10 @@ static RETSIGTYPE receive_signal(int signum)
   int tmp;
 
   if ((signum < 0) || (signum >= MAX_SIGNALS)) {
-    // Some OSs (Solaris 2.6) send a bad signum sometimes.
-    // SIGCHLD is the safest signal to substitute.
-    //	/grubba 1998-05-19
+    /* Some OSs (Solaris 2.6) send a bad signum sometimes.
+     * SIGCHLD is the safest signal to substitute.
+     *	/grubba 1998-05-19
+     */
     signum = SIGCHLD;
   }