diff --git a/configure.ac b/configure.ac
index 52fc51d..e93fc52 100644
--- a/configure.ac
+++ b/configure.ac
@@ -179,7 +179,7 @@ eval shout_includedir="$includedir"
 prefix="$save_prefix"
 
 SHOUT_VERSION="$VERSION"
-SHOUT_CPPFLAGS="-I$shout_includedir $VORBIS_CFLAGS $PTHREAD_CPPFLAGS"
+SHOUT_CPPFLAGS="$VORBIS_CFLAGS $PTHREAD_CPPFLAGS"
 SHOUT_CFLAGS="$PTHREAD_CFLAGS"
 SHOUT_LIBS="-lshout"