diff --git a/benchmarks/iperf/Makefile b/benchmarks/iperf/Makefile
index 4c7243069..1882a1ae7 100644
--- a/benchmarks/iperf/Makefile
+++ b/benchmarks/iperf/Makefile
@@ -2,7 +2,7 @@ PLUGIN_NAME=		iperf
 PLUGIN_VERSION=		1.0
 PLUGIN_REVISION=	1
 PLUGIN_COMMENT=		Connection speed tester
-PLUGIN_DEPENDS=		iperf3 ruby
+PLUGIN_DEPENDS=		iperf3 ruby rubygem-rexml
 PLUGIN_MAINTAINER=	franz.fabian.94@gmail.com
 
 .include "../../Mk/plugins.mk"