diff --git a/azurerm/internal/services/network/resource_arm_web_application_firewall_policy.go b/azurerm/internal/services/network/resource_arm_web_application_firewall_policy.go
index 7060af38da2e..34b6cf12ff6f 100644
--- a/azurerm/internal/services/network/resource_arm_web_application_firewall_policy.go
+++ b/azurerm/internal/services/network/resource_arm_web_application_firewall_policy.go
@@ -461,7 +461,7 @@ func expandArmWebApplicationFirewallPolicyManagedRuleSet(input []interface{}) *[
 		ruleSetType := v["type"].(string)
 		ruleSetVersion := v["version"].(string)
 		ruleGroupOverrides := []interface{}{}
-		if value, exists := v["rule_group_overrides"]; exists {
+		if value, exists := v["rule_group_override"]; exists {
 			ruleGroupOverrides = value.([]interface{})
 		}
 		result := network.ManagedRuleSet{