diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index 0de34d58f..16860aeae 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -214,6 +214,7 @@ set (TARGET_SOURCES
         ${PM3_ROOT}/client/src/cmdlfawid.c
         ${PM3_ROOT}/client/src/cmdlfcotag.c
         ${PM3_ROOT}/client/src/cmdlfem4x.c
+        ${PM3_ROOT}/client/src/cmdlfem4x50.c
         ${PM3_ROOT}/client/src/cmdlffdx.c
         ${PM3_ROOT}/client/src/cmdlfgallagher.c
         ${PM3_ROOT}/client/src/cmdlfguard.c