diff --git a/centrifuge.wdl b/centrifuge.wdl
index 5c9ef0870ec12c04bf09cd883f9bd714afabf457..5110b8723e20a2a964032c88921bbb917d0fc949 100644
--- a/centrifuge.wdl
+++ b/centrifuge.wdl
@@ -134,7 +134,7 @@ task Classify {
     }
 
     runtime {
-        cpu: cores
+        cpu: threads
         memory: memory
         docker: dockerImage
     }