diff --git a/config/config.go b/config/config.go
index 463dbc357..4fc929f7a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -399,7 +399,7 @@ type GlobalConfig struct {
 	// How frequently to evaluate rules by default.
 	EvaluationInterval model.Duration `yaml:"evaluation_interval,omitempty"`
 	// Offset the rule evaluation timestamp of this particular group by the specified duration into the past to ensure the underlying metrics have been received.
-	RuleQueryOffset model.Duration `yaml:"rule_query_offset"`
+	RuleQueryOffset model.Duration `yaml:"rule_query_offset,omitempty"`
 	// File to which PromQL queries are logged.
 	QueryLogFile string `yaml:"query_log_file,omitempty"`
 	// The labels to add to any timeseries that this Prometheus instance scrapes.