diff --git a/configure.in b/configure.in
index 8c99b48..b87b8d1 100644
--- a/configure.in
+++ b/configure.in
@@ -102,7 +102,7 @@ AC_CHECK_HEADER([GL/gl.h], \
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 cxx_flags_safe="$CXXFLAGS"
-CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS"
+CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS -I$qt_includes"
 AC_CHECK_HEADER([ffmpeg/avcodec.h], \
 [AC_DEFINE(OLD_FFMPEG,1, [old ffmpeg])], \
   [AC_CHECK_HEADER([libavcodec/avcodec.h], \
@@ -115,7 +115,7 @@ AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 cxx_flags_safe="$CXXFLAGS"
 cflags_safe="$CFLAGS"
-CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS"
+CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS -I$qt_includes"
 CFLAGS="$CFLAGS -D__STDC_CONSTANT_MACROS"
 AC_MSG_CHECKING([if libavformat/avformat.h provides av_free_packet])
 AC_TRY_LINK([#include <libavformat/avformat.h>
diff --git a/configure.in.in b/configure.in.in
index b0446b2..414ff9a 100755
--- a/configure.in.in
+++ b/configure.in.in
@@ -46,7 +46,7 @@ AC_CHECK_HEADER([GL/gl.h], \
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 cxx_flags_safe="$CXXFLAGS"
-CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS"
+CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS -I$qt_includes"
 AC_CHECK_HEADER([ffmpeg/avcodec.h], \
 [AC_DEFINE(OLD_FFMPEG,1, [old ffmpeg])], \
   [AC_CHECK_HEADER([libavcodec/avcodec.h], \
@@ -59,7 +59,7 @@ AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 cxx_flags_safe="$CXXFLAGS"
 cflags_safe="$CFLAGS"
-CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS"
+CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS -I$qt_includes"
 CFLAGS="$CFLAGS -D__STDC_CONSTANT_MACROS"
 AC_MSG_CHECKING([if libavformat/avformat.h provides av_free_packet])
 AC_TRY_LINK([#include <libavformat/avformat.h>