diff --git a/ROMFS/px4fmu_common/mixers/CMakeLists.txt b/ROMFS/px4fmu_common/mixers/CMakeLists.txt
index 2662bdd72a..ed45ced5d1 100644
--- a/ROMFS/px4fmu_common/mixers/CMakeLists.txt
+++ b/ROMFS/px4fmu_common/mixers/CMakeLists.txt
@@ -50,7 +50,6 @@ px4_add_romfs_files(
 	dodeca_top_cox.main.mix
 	firefly6.aux.mix
 	firefly6.main.mix
-	FMU_pass.mix
 	fw_generic_wing.main.mix
 	FX79.main.mix
 	hexa_cox.main.mix
diff --git a/ROMFS/px4fmu_common/mixers/FMU_pass.mix b/ROMFS/px4fmu_common/mixers/FMU_pass.mix
deleted file mode 100644
index 2f01459d60..0000000000
--- a/ROMFS/px4fmu_common/mixers/FMU_pass.mix
+++ /dev/null
@@ -1,19 +0,0 @@
-Passthrough mixer for PX4FMU
-============================
-
-This file defines passthrough mixers suitable for testing.
-
-Channel group 0, channels 0-3 are passed directly through to the outputs.
-
-M: 1
-S: 0 0  10000  10000      0 -10000  10000
-
-M: 1
-S: 0 1  10000  10000      0 -10000  10000
-
-M: 1
-S: 0 2  10000  10000      0 -10000  10000
-
-M: 1
-S: 0 3  10000  10000      0 -10000  10000
-