diff --git a/parser/build.gradle b/parser/build.gradle
index c298b8883..01a7ac00f 100644
--- a/parser/build.gradle
+++ b/parser/build.gradle
@@ -19,10 +19,14 @@ generateGrammarSource {
     outputDirectory = file("src/prog8/parser")
     arguments += ["-no-listener","-no-visitor"]
 }
+
 sourceSets {
     main {
         java {
             srcDirs = ["${project.projectDir}/src"]
         }
+        antlr {
+        	srcDirs = ["${project.projectDir}/antlr"]
+        }
     }
 }
\ No newline at end of file