diff --git a/sys/dev/dc/if_dc.c b/sys/dev/dc/if_dc.c
index 84538e43e01..262387ddf74 100644
--- a/sys/dev/dc/if_dc.c
+++ b/sys/dev/dc/if_dc.c
@@ -109,7 +109,6 @@
 #include <machine/bus_memio.h>
 #include <machine/bus.h>
 #include <machine/resource.h>
-#include <machine/mutex.h>
 #include <sys/bus.h>
 #include <sys/rman.h>
 
diff --git a/sys/pci/if_dc.c b/sys/pci/if_dc.c
index 84538e43e01..262387ddf74 100644
--- a/sys/pci/if_dc.c
+++ b/sys/pci/if_dc.c
@@ -109,7 +109,6 @@
 #include <machine/bus_memio.h>
 #include <machine/bus.h>
 #include <machine/resource.h>
-#include <machine/mutex.h>
 #include <sys/bus.h>
 #include <sys/rman.h>