diff --git a/src/Hydra/script/hydra_queue_runner.pl b/src/Hydra/script/hydra_queue_runner.pl
index 43b1e6cf..67713345 100755
--- a/src/Hydra/script/hydra_queue_runner.pl
+++ b/src/Hydra/script/hydra_queue_runner.pl
@@ -14,6 +14,8 @@ my $db = openHydraDB;
 my $hydraHome = $ENV{"HYDRA_HOME"};
 die "The HYDRA_HOME environment variable is not set!\n" unless defined $hydraHome;
 
+$SIG{CHLD} = 'IGNORE';
+
 
 sub unlockDeadBuilds {
     # Unlock builds whose building process has died.