diff --git a/src/main/target/ALIENFLIGHTF3/target.mk b/src/main/target/ALIENFLIGHTF3/target.mk
index fc9d28c28..04ba9c48f 100644
--- a/src/main/target/ALIENFLIGHTF3/target.mk
+++ b/src/main/target/ALIENFLIGHTF3/target.mk
@@ -8,6 +8,5 @@ TARGET_SRC = \
             drivers/accgyro_mpu6500.c \
             drivers/accgyro_spi_mpu6500.c \
             drivers/compass_ak8963.c \
-            hardware_revision.c \
             drivers/sonar_hcsr04.c
 
diff --git a/src/main/target/NAZE/target.mk b/src/main/target/NAZE/target.mk
index 45d87e4b7..07d81cf44 100644
--- a/src/main/target/NAZE/target.mk
+++ b/src/main/target/NAZE/target.mk
@@ -17,5 +17,4 @@ TARGET_SRC = \
             drivers/compass_hmc5883l.c \
             drivers/light_ws2811strip.c \
             drivers/light_ws2811strip_stm32f10x.c \
-            drivers/sonar_hcsr04.c \
-            hardware_revision.c
+            drivers/sonar_hcsr04.c