diff --git a/audio/utils.c b/audio/utils.c
index 2fbe475587..a0637a5382 100644
--- a/audio/utils.c
+++ b/audio/utils.c
@@ -13,8 +13,11 @@
  *  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "../boolean.h"
 #include "utils.h"
 
+#include "../general.h"
+
 #if defined(__SSE2__)
 #include <emmintrin.h>
 #elif defined(__ALTIVEC__)