diff --git a/aws/validators.go b/aws/validators.go
index <HASH>..<HASH> 100644
--- a/aws/validators.go
+++ b/aws/validators.go
@@ -2479,7 +2479,7 @@ var validateCloudWatchEventCustomEventBusName = validation.All(
 
 var validateCloudWatchEventBusName = validation.All(
 	validation.StringLenBetween(1, 256),
-	validation.StringMatch(regexp.MustCompile(`^[a-zA-Z0-9._\-]+$`), ""),
+	validation.StringMatch(regexp.MustCompile(`^[a-zA-Z0-9._\-/]+$`), ""),
 )
 
 var validateServiceDiscoveryNamespaceName = validation.All(
Fix validation for CloudWatch event bus name

Now validation matches the pattern described in [AWS docs][1]. Slash
in names allows to create event buses associated with partner event
sources (where names might contain slashes), since both names should match.

[1]: <URL>