diff --git a/sys/dev/fdt/fdt_pci.c b/sys/dev/fdt/fdt_pci.c
index 14aa2700885..7f0ddd37e3e 100644
--- a/sys/dev/fdt/fdt_pci.c
+++ b/sys/dev/fdt/fdt_pci.c
@@ -46,9 +46,6 @@ __FBSDID("$FreeBSD$");
 #include "ofw_bus_if.h"
 #include "pcib_if.h"
 
-#define DEBUG
-#undef DEBUG
-
 #ifdef DEBUG
 #define debugf(fmt, args...) do { printf("%s(): ", __func__);	\
     printf(fmt,##args); } while (0)
diff --git a/sys/dev/fdt/fdtbus.c b/sys/dev/fdt/fdtbus.c
index 50db7cdd350..577b1596a3a 100644
--- a/sys/dev/fdt/fdtbus.c
+++ b/sys/dev/fdt/fdtbus.c
@@ -46,9 +46,6 @@ __FBSDID("$FreeBSD$");
 #include "fdt_common.h"
 #include "ofw_bus_if.h"
 
-#define DEBUG
-#undef DEBUG
-
 #ifdef DEBUG
 #define debugf(fmt, args...) do { printf("%s(): ", __func__);	\
     printf(fmt,##args); } while (0)
diff --git a/sys/dev/fdt/simplebus.c b/sys/dev/fdt/simplebus.c
index 3fa1dd88208..e6887b48c2e 100644
--- a/sys/dev/fdt/simplebus.c
+++ b/sys/dev/fdt/simplebus.c
@@ -49,9 +49,6 @@ __FBSDID("$FreeBSD$");
 #include "fdt_common.h"
 #include "ofw_bus_if.h"
 
-#define DEBUG
-#undef DEBUG
-
 #ifdef DEBUG
 #define debugf(fmt, args...) do { printf("%s(): ", __func__);	\
     printf(fmt,##args); } while (0)