diff --git a/scripts/base/utils/json.bro b/scripts/base/utils/json.bro
index b6d0093b58..5b66f3ad02 100644
--- a/scripts/base/utils/json.bro
+++ b/scripts/base/utils/json.bro
@@ -25,6 +25,10 @@ function to_json(v: any, only_loggable: bool &default=F, field_escape_pattern: p
 		case "port":
 		return cat(port_to_count(to_port(cat(v))));
 
+		case "enum":
+		fallthrough;
+		case "interval":
+		fallthrough;
 		case "addr":
 		fallthrough;
 		case "subnet":
@@ -37,12 +41,12 @@ function to_json(v: any, only_loggable: bool &default=F, field_escape_pattern: p
 		case "time":
 		fallthrough;
 		case "double":
-		fallthrough;
-		case "bool":
-		fallthrough;
-		case "enum":
 		return cat(v);
 
+		case "bool":
+		local bval: bool = v;
+		return bval ? "true" : "false";
+
 		default:
 		break;
 		}
diff --git a/testing/btest/Baseline/scripts.base.utils.json/output b/testing/btest/Baseline/scripts.base.utils.json/output
index a1f6875417..f7a16cb2bb 100644
--- a/testing/btest/Baseline/scripts.base.utils.json/output
+++ b/testing/btest/Baseline/scripts.base.utils.json/output
@@ -1,11 +1,11 @@
-T
+true
 123
 -999
 1.123457
 -1.123456e+308
 0
 1.0
-""
+"-12.0 hrs"
 "hello"
 ""
 65535
@@ -17,7 +17,7 @@ T
 "123.123.123.123"
 "192.0.0.0/8"
 "fe80::/64"
-Red
+"Red"
 {"s": "test", "c": 100}
 {"s": "test"}
 {"s": "test"}
@@ -25,7 +25,7 @@ Red
 []
 [2, 1]
 ["1.2.3.4"]
-[[T, F]]
+[[true, false]]
 [{"s": "test"}]
 []
 [2, 1]