diff --git a/src/main/java/net/fabricmc/loom/task/RunClientTask.java b/src/main/java/net/fabricmc/loom/task/RunClientTask.java
index 5fe80e07..ac69a638 100644
--- a/src/main/java/net/fabricmc/loom/task/RunClientTask.java
+++ b/src/main/java/net/fabricmc/loom/task/RunClientTask.java
@@ -77,7 +77,7 @@ public class RunClientTask extends JavaExec {
 	@Override
 	public List<String> getJvmArgs() {
 		LoomGradleExtension extension = this.getProject().getExtensions().getByType(LoomGradleExtension.class);
-		List<String> args = new ArrayList<>();
+		List<String> args = new ArrayList<>(super.getJvmArgs());
 		args.add("-Dfabric.development=true");
 		return args;
 	}
diff --git a/src/main/java/net/fabricmc/loom/task/RunServerTask.java b/src/main/java/net/fabricmc/loom/task/RunServerTask.java
index 5f13981e..dd5e4006 100644
--- a/src/main/java/net/fabricmc/loom/task/RunServerTask.java
+++ b/src/main/java/net/fabricmc/loom/task/RunServerTask.java
@@ -73,7 +73,7 @@ public class RunServerTask extends JavaExec {
 	@Override
 	public List<String> getJvmArgs() {
 		LoomGradleExtension extension = this.getProject().getExtensions().getByType(LoomGradleExtension.class);
-		List<String> args = new ArrayList<>();
+		List<String> args = new ArrayList<>(super.getJvmArgs());
 		args.add("-Dfabric.development=true");
 		return args;
 	}