1 files changed, 2 insertions, 2 deletions
diff --git a/eqn.c b/eqn.c
index 5455403f..0da67f19 100644
--- a/eqn.c
+++ b/eqn.c
@@ -14,9 +14,9 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
-#ifdef HAVE_CONFIG_H
 #include "config.h"
-#endif
+
+#include <sys/types.h>
 
 #include <assert.h>
 #include <limits.h>