diff --git a/java_tools/gcc_map_reader/build.gradle b/java_tools/gcc_map_reader/build.gradle
index 67ae14ad9f..25491e6279 100644
--- a/java_tools/gcc_map_reader/build.gradle
+++ b/java_tools/gcc_map_reader/build.gradle
@@ -14,6 +14,8 @@ dependencies {
 }
 
 jar {
+    mainClassName = 'rusefi.GccMapReader'
+
     destinationDirectory = file( '$rootDir/../..' )
     manifest {
         attributes(