diff --git a/command/agent/config.go b/command/agent/config.go
index 419fa9091..d253dabcd 100644
--- a/command/agent/config.go
+++ b/command/agent/config.go
@@ -700,6 +700,9 @@ func MergeConfig(a, b *Config) *Config {
 	if b.RetryMaxAttempts != 0 {
 		result.RetryMaxAttempts = b.RetryMaxAttempts
 	}
+	if b.RetryInterval != 0 {
+		result.RetryInterval = b.RetryInterval
+	}
 	if b.DNSConfig.NodeTTL != 0 {
 		result.DNSConfig.NodeTTL = b.DNSConfig.NodeTTL
 	}