diff --git a/build.gradle b/build.gradle
index d9b78641f..5f6008f0c 100755
--- a/build.gradle
+++ b/build.gradle
@@ -61,7 +61,9 @@ minecraft {
     mappings = 'snapshot_20180731'
     tweakClass = 'baritone.launch.BaritoneTweaker'
     runDir = 'run'
-    makeObfSourceJar = false
+
+    // The sources jar should use SRG names not MCP to ensure compatibility with all mappings
+    makeObfSourceJar = true
 }
 
 repositories {