diff --git a/client/Makefile b/client/Makefile
index 3bd059318..a4e8b193d 100644
--- a/client/Makefile
+++ b/client/Makefile
@@ -439,6 +439,7 @@ SRCS =  aidsearch.c \
 		cmdlfawid.c \
 		cmdlfcotag.c \
 		cmdlfem4x.c \
+		cmdlfem4x50.c \
 		cmdlffdx.c \
 		cmdlfguard.c \
 		cmdlfgallagher.c \