diff --git a/gradle/nshm.gradle b/gradle/nshm.gradle
index 6a761b87dd91dc32d73c04b098688df314c4d6bd..f4ba171888c411048605a30050ea0f7cdc07aa65 100644
--- a/gradle/nshm.gradle
+++ b/gradle/nshm.gradle
@@ -14,7 +14,7 @@ import org.yaml.snakeyaml.Yaml
 ext {
   nshmDir = "nshms";
   envMemory = System.getenv("CI_RUNNER_MEMORY")
-  def xmx = envMemory ? envMemory : "16g"
+  xmx = envMemory ? envMemory : "16g"
 
   // Download and unzip NSHM
   downloadNshm = {nshm ->