diff --git a/lib/helpers/ovirt.rb b/lib/helpers/ovirt.rb
index 4fd3bbb9f..a84a3a2d0 100644
--- a/lib/helpers/ovirt.rb
+++ b/lib/helpers/ovirt.rb
@@ -265,7 +265,7 @@ class OVirtFunctions
     ovirt_vm_names = build_ovirt_names(scenario_path, options[:prefix], vm_names)
     ovirt_vm_names.each do |vm_name|
       # python affinity group
-      if system "python #{ROOT_DIR}/lib/helpers/ovirt_affinity.py #{options[:ovirtaffinitygroup]} #{vm_name} #{options[:ovirturl]} #{options[:ovirtuser]} #{options[:ovirtpass]}"
+      if system "python3 #{ROOT_DIR}/lib/helpers/ovirt_affinity.py #{options[:ovirtaffinitygroup]} #{vm_name} #{options[:ovirturl]} #{options[:ovirtuser]} #{options[:ovirtpass]}"
         Print.std "Affinity group assigned"
       else
         Print.err "Failed to assign affinity group"
@@ -349,4 +349,4 @@ class OVirtFunctions
     end
   end
 
-end
\ No newline at end of file
+end