complete largefile support
diff --git a/src/libFLAC/float.c b/src/libFLAC/float.c
index 534aa8d..7c58f65 100644
--- a/src/libFLAC/float.c
+++ b/src/libFLAC/float.c
@@ -29,6 +29,10 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#if HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include "FLAC/assert.h"
 
 #include "private/float.h"