diff --git a/src/i830_memory.c b/src/i830_memory.c
index 85b6528..3379b66 100644
--- a/src/i830_memory.c
+++ b/src/i830_memory.c
@@ -99,6 +99,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <assert.h>
 #include <string.h>
 #include <errno.h>
+#include <sys/types.h>
 #include <sys/mman.h>
 
 #include "xf86.h"