diff --git a/java/config/makevars.go b/java/config/makevars.go
index 275f496..01adaa7 100644
--- a/java/config/makevars.go
+++ b/java/config/makevars.go
@@ -65,6 +65,7 @@
 	ctx.Strict("JMOD", "${JmodCmd}")
 
 	ctx.Strict("SOONG_JAVAC_WRAPPER", "${SoongJavacWrapper}")
+	ctx.Strict("DEXPREOPT_GEN", "${DexpreoptGen}")
 	ctx.Strict("ZIPSYNC", "${ZipSyncCmd}")
 
 	ctx.Strict("JACOCO_CLI_JAR", "${JacocoCLIJar}")