diff --git a/apstra/resource_configlet.go b/apstra/resource_configlet.go
index ec067cbb..439ec2ab 100644
--- a/apstra/resource_configlet.go
+++ b/apstra/resource_configlet.go
@@ -78,6 +78,11 @@ func (o *resourceConfiglet) ValidateConfig(ctx context.Context, req resource.Val
 		return
 	}
 
+	// Delay Validation until the involved attributes have a known value.
+	if config.Generators.IsUnknown() {
+		return
+	}
+
 	// extract generators from config
 	var generators []design.ConfigletGenerator
 	resp.Diagnostics.Append(config.Generators.ElementsAs(ctx, &generators, false)...)