diff --git a/firmware/config/engines/engines.mk b/firmware/config/engines/engines.mk
index ee15d9ba3d..27ca4982db 100644
--- a/firmware/config/engines/engines.mk
+++ b/firmware/config/engines/engines.mk
@@ -1,6 +1,4 @@
 
-ENGINES_SRC = 
-
 ENGINES_SRC_CPP = $(PROJECT_DIR)/config/engines/ford_aspire.cpp \
 	$(PROJECT_DIR)/config/engines/custom_engine.cpp \
 	$(PROJECT_DIR)/config/engines/bmw_m73.cpp \
diff --git a/firmware/controllers/math/math.mk b/firmware/controllers/math/math.mk
index 99e4cfd952..3982378c95 100644
--- a/firmware/controllers/math/math.mk
+++ b/firmware/controllers/math/math.mk
@@ -1,6 +1,4 @@
 
-CONTROLLERS_MATH_SRC = 
-
 CONTROLLERS_MATH_SRC_CPP = $(PROJECT_DIR)/controllers/math/engine_math.cpp \
 	$(PROJECT_DIR)/controllers/math/pid_auto_tune.cpp \
 	$(PROJECT_DIR)/controllers/math/speed_density.cpp \
diff --git a/firmware/controllers/trigger/trigger.mk b/firmware/controllers/trigger/trigger.mk
index ca3661848d..258aa43b6f 100644
--- a/firmware/controllers/trigger/trigger.mk
+++ b/firmware/controllers/trigger/trigger.mk
@@ -20,8 +20,6 @@ TRIGGER_DECODERS_SRC_CPP = \
 	$(CONTROLLERS_DIR)/trigger/decoders/trigger_misc.cpp \
 	$(CONTROLLERS_DIR)/trigger/decoders/trigger_universal.cpp
 
-TRIGGER_SRC =
-
 TRIGGER_SRC_CPP = \
 	$(CONTROLLERS_DIR)/trigger/trigger_emulator_algo.cpp \
 	$(CONTROLLERS_DIR)/trigger/trigger_central.cpp