diff --git a/src/runtime/.gitignore b/src/runtime/.gitignore
index 0cc78193acba..5d402b719eb5 100644
--- a/src/runtime/.gitignore
+++ b/src/runtime/.gitignore
@@ -18,3 +18,4 @@ config-generated.go
 /virtcontainers/hook/mock/hook
 /virtcontainers/profile.cov
 /virtcontainers/utils/supportfiles
+/virtcontainers/cpu_affinity_idx