diff --git a/wireless/Makefile b/wireless/Makefile
index 008d23ff1c8..f05d957943d 100644
--- a/wireless/Makefile
+++ b/wireless/Makefile
@@ -52,14 +52,6 @@ VPATH = .
 
 include ieee802154$(DELIM)Make.defs
 
-# Include support for various drivers.  Each Make.defs file will add its
-# files to the source file list, add its DEPPATH info, and will add
-# the appropriate paths to the VPATH variable
-
-ifeq ($(CONFIG_WIRELESS_FORMAT_PCM),y)
-  CSRCS += pcm_decode.c
-endif
-
 AOBJS = $(ASRCS:.S=$(OBJEXT))
 COBJS = $(CSRCS:.c=$(OBJEXT))
 
diff --git a/wireless/ieee802154/Make.defs b/wireless/ieee802154/Make.defs
index 5d54b0004d6..834b3da2108 100644
--- a/wireless/ieee802154/Make.defs
+++ b/wireless/ieee802154/Make.defs
@@ -36,6 +36,7 @@
 ifeq ($(CONFIG_WIRELESS_IEEE802154),y)
 
 # Include IEEE 802.15.4 support
+
 CSRCS =
 
 # Include wireless devices build support