diff --git a/flash.h b/flash.h
index 59c6c47..e3cd49e 100644
--- a/flash.h
+++ b/flash.h
@@ -34,7 +34,7 @@
 #define __DARWIN__
 #endif
 
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) || defined(__DragonFly__)
   #include <machine/cpufunc.h>
   #define off64_t off_t
   #define lseek64 lseek
diff --git a/flashrom.c b/flashrom.c
index 8e1c3e4..0e3049c 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -344,7 +344,7 @@
 	int force = 0;
 	int read_it = 0, write_it = 0, erase_it = 0, verify_it = 0;
 	int ret = 0, i;
-#ifdef __FreeBSD__
+#if defined(__FreeBSD__) || defined(__DragonFly__)
 	int io_fd;
 #endif
 
@@ -462,7 +462,7 @@
 	/* First get full io access */
 #if defined (__sun) && (defined(__i386) || defined(__amd64))
 	if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) {
-#elif defined(__FreeBSD__)
+#elif defined(__FreeBSD__) || defined (__DragonFly__)
 	if ((io_fd = open("/dev/io", O_RDWR)) < 0) {
 #else
 	if (iopl(3) != 0) {