diff --git a/pkg/cluster/connection_pooler.go b/pkg/cluster/connection_pooler.go
index 761644e13..eed6c30f8 100644
--- a/pkg/cluster/connection_pooler.go
+++ b/pkg/cluster/connection_pooler.go
@@ -352,7 +352,7 @@ func (c *Cluster) generateConnectionPoolerPodTemplate(role PostgresRole) (
 			crtFile = "tls.crt"
 		}
 		if keyFile == "" {
-			crtFile = "tls.key"
+			keyFile = "tls.key"
 		}
 
 		envVars = append(