diff --git a/stackcollapse-java-exceptions.pl b/stackcollapse-java-exceptions.pl
index 1c384cdf..19badbca 100755
--- a/stackcollapse-java-exceptions.pl
+++ b/stackcollapse-java-exceptions.pl
@@ -59,6 +59,7 @@ sub remember_stack {
 		}
 		unshift @stack, $func;
 	} elsif (@stack ) {
+		next if m/.*waiting on .*/;
 		remember_stack(join(";", @stack), 1) if @stack;
 		undef @stack;
   }