diff --git a/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.dev_docker_image b/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.dev_docker_image
index 0d762b81..b490ec8a 100644
--- a/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.dev_docker_image
+++ b/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.dev_docker_image
@@ -21,3 +21,4 @@ PIP_PACKAGES="pci-irq-affinity-agent \
     python-novaclient \
     retrying \
     psutil"
+PYTHON3=no
diff --git a/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.stable_docker_image b/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.stable_docker_image
index 0d762b81..b490ec8a 100644
--- a/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.stable_docker_image
+++ b/utilities/pci-irq-affinity-agent/centos/pci-irq-affinity.stable_docker_image
@@ -21,3 +21,4 @@ PIP_PACKAGES="pci-irq-affinity-agent \
     python-novaclient \
     retrying \
     psutil"
+PYTHON3=no