diff --git a/services/harmony/app/util/env.ts b/services/harmony/app/util/env.ts
index 45a0656d0..b224c03cb 100644
--- a/services/harmony/app/util/env.ts
+++ b/services/harmony/app/util/env.ts
@@ -1,4 +1,4 @@
-import { IsInt, IsNotEmpty, Matches, Min } from 'class-validator';
+import { IsInt, IsNotEmpty, IsPositive, Matches, Min } from 'class-validator';
 import { HarmonyEnv, memorySizeRegex } from '@harmony/util/env';
 import _ from 'lodash';
 import * as path from 'path';
@@ -108,6 +108,7 @@ class HarmonyServerEnv extends HarmonyEnv {
   @Min(1)
   maxDataOperationCacheSize: number;
 
+  @IsPositive()
   wktPrecision: number;
 
   locallyDeployedServices: string;