diff --git a/json/src/spec/spec.rs b/json/src/spec/spec.rs
index bb3f861cd..27c27ce0a 100644
--- a/json/src/spec/spec.rs
+++ b/json/src/spec/spec.rs
@@ -78,9 +78,9 @@ mod tests {
 		"frontierCompatibilityModeLimit": "0x789b0",
 		"maximumExtraDataSize": "0x20",
 		"minGasLimit": "0x1388",
-		"networkID" : "0x2"
+		"networkID" : "0x2",
 		"forkBlock": "0xffffffffffffffff",
-		"forkCanonHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+		"forkCanonHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
 	},
 	"genesis": {
 		"seal": {