diff --git a/osdep-cygwin.c b/osdep-cygwin.c
index f3a90426..91bc5fc9 100644
--- a/osdep-cygwin.c
+++ b/osdep-cygwin.c
@@ -16,7 +16,7 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/types.h>
+#include <sys/param.h>
 #include <sys/stat.h>
 
 #include <event.h>