diff --git a/src/main/java/net/fabricmc/loom/task/GenIdeaProjectTask.java b/src/main/java/net/fabricmc/loom/task/GenIdeaProjectTask.java
index 2521bf3..eb47cd5 100644
--- a/src/main/java/net/fabricmc/loom/task/GenIdeaProjectTask.java
+++ b/src/main/java/net/fabricmc/loom/task/GenIdeaProjectTask.java
@@ -139,7 +139,7 @@ public class GenIdeaProjectTask extends DefaultTask {
 		ideaClient.projectName = project.getName();
 		ideaClient.configName = "Minecraft Client";
 		ideaClient.runDir = "file://$PROJECT_DIR$/" + extension.runDir;
-		ideaClient.vmArgs = "-Djava.library.path=" + Constants.MINECRAFT_NATIVES.get(extension).getAbsolutePath() + " -Dfabric.development=true";
+		ideaClient.vmArgs = "-Djava.library.path=" + Constants.MINECRAFT_NATIVES.get(extension).getAbsolutePath() + " -Doml.development=true";
 		ideaClient.programArgs = "--tweakClass com.openmodloader.loader.launch.OpenClientTweaker --assetIndex " + version.assetIndex.id + " --assetsDir " + new File(extension.getUserCache(), "assets-" + extension.version).getAbsolutePath();
 
 		runManager.appendChild(ideaClient.genRuns(runManager));
@@ -149,7 +149,7 @@ public class GenIdeaProjectTask extends DefaultTask {
 		ideaServer.projectName = project.getName();
 		ideaServer.configName = "Minecraft Server";
 		ideaServer.runDir = "file://$PROJECT_DIR$/" + extension.runDir;
-		ideaServer.vmArgs = "-Dfabric.development=true";
+		ideaServer.vmArgs = "-Doml.development=true";
 		ideaServer.programArgs = "--tweakClass com.openmodloader.loader.launch.OpenServerTweaker";
 
 		runManager.appendChild(ideaServer.genRuns(runManager));