diff --git a/.changelog/22315.txt b/.changelog/22315.txt
new file mode 100644
index 00000000000..98b7122cdc8
--- /dev/null
+++ b/.changelog/22315.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+resource/aws_ec2_traffic_mirror_filter_rule: Prevent crash during resource read
+```
\ No newline at end of file
diff --git a/internal/service/ec2/traffic_mirror_filter_rule.go b/internal/service/ec2/traffic_mirror_filter_rule.go
index 1e772bd4bc8..4466b4cc64b 100644
--- a/internal/service/ec2/traffic_mirror_filter_rule.go
+++ b/internal/service/ec2/traffic_mirror_filter_rule.go
@@ -356,7 +356,7 @@ func buildTrafficMirrorFilterRulePortRangeSchema(portRange *ec2.TrafficMirrorPor
 		return nil
 	}
 
-	var out [1]interface{}
+	out := make([]interface{}, 1)
 	elem := make(map[string]interface{})
 	elem["from_port"] = portRange.FromPort
 	elem["to_port"] = portRange.ToPort