diff --git a/simulator/Makefile b/simulator/Makefile
index fa075dfcf3..f1f21062f4 100644
--- a/simulator/Makefile
+++ b/simulator/Makefile
@@ -21,7 +21,7 @@ RULESFILE = $(RULESPATH)/rules.mk
 PROJECT_CPU=simulator
 
 include ../firmware/rusefi.mk
-RULESFILE = ../firmware/rusefi_rules.mk
+include ../firmware/rusefi_rules.mk
 
 # Configure precompiled header
 PCH_DIR = $(PROJECT_DIR)/pch