diff --git a/ipc/glue/RPCChannel.cpp b/ipc/glue/RPCChannel.cpp
index f1b82f92270a..c7fc353159c5 100644
--- a/ipc/glue/RPCChannel.cpp
+++ b/ipc/glue/RPCChannel.cpp
@@ -166,10 +166,7 @@ RPCChannel::Call(Message* msg, Message* reply)
             if (EventOccurred())
                 break;
 
-            // an event didn't occur. So we better have timed out!
-            NS_ABORT_IF_FALSE(maybeTimedOut,
-                              "neither received a reply nor detected a hang!");
-            if (!ShouldContinueFromTimeout())
+            if (maybeTimedOut && !ShouldContinueFromTimeout())
                 return false;
         }
 
diff --git a/ipc/glue/SyncChannel.cpp b/ipc/glue/SyncChannel.cpp
index 13c0d54dc994..46f396fd2b5b 100644
--- a/ipc/glue/SyncChannel.cpp
+++ b/ipc/glue/SyncChannel.cpp
@@ -114,10 +114,7 @@ SyncChannel::Send(Message* msg, Message* reply)
         if (EventOccurred())
             break;
 
-        // an event didn't occur. So we better have timed out!
-        NS_ABORT_IF_FALSE(maybeTimedOut,
-                          "neither received a reply nor detected a hang!");
-        if (!ShouldContinueFromTimeout())
+        if (maybeTimedOut && !ShouldContinueFromTimeout())
             return false;
     }