diff --git a/lib/radio/cordic/sim/Makefile.cordic_pipe_top b/lib/radio/cordic/sim/Makefile.cordic_pipe_top
index 326c146..ba9fc46 100644
--- a/lib/radio/cordic/sim/Makefile.cordic_pipe_top
+++ b/lib/radio/cordic/sim/Makefile.cordic_pipe_top
@@ -3,7 +3,6 @@
 # -------------------------------------------------
 LANG_STD := 93c
 IEEE_STD := standard
-WORK_DIR := work
 WORK_LIB := work
 
 # -------------------------------------------------
diff --git a/lib/radio/cordic/sim/Makefile.cordic_top b/lib/radio/cordic/sim/Makefile.cordic_top
index 865d945..a43d063 100644
--- a/lib/radio/cordic/sim/Makefile.cordic_top
+++ b/lib/radio/cordic/sim/Makefile.cordic_top
@@ -3,7 +3,6 @@
 # -------------------------------------------------
 LANG_STD := 93c
 IEEE_STD := standard
-WORK_DIR := work
 WORK_LIB := work
 
 # -------------------------------------------------