diff --git a/darkice/branches/darkice-aacp/configure.in b/darkice/branches/darkice-aacp/configure.in
index 25d98ec..ccd3628 100644
--- a/darkice/branches/darkice-aacp/configure.in
+++ b/darkice/branches/darkice-aacp/configure.in
@@ -165,6 +165,9 @@ AC_ARG_WITH(aacplus-prefix,
     CONFIG_AACPLUS_PREFIX="${withval}", CONFIG_AACPLUS_PREFIX="/usr")
 
 if test "x${USE_AACPLUS}" = "xyes" ; then
+    if test "x${FAAC_LIB_LOC}" != "x" ; then
+	AC_MSG_ERROR( [compliling with faac and aacplus is not supported yet, please disable faac by "--without-faac"] )
+    fi
     AC_MSG_CHECKING( [for aacplus library at ${CONFIG_AACPLUS_PREFIX}] )
     LA_SEARCH_LIB( AACPLUS_LIB_LOC, AACPLUS_INC_LOC, libaacplus.a libaacplus.so, sbr_main.h,
                    ${CONFIG_AACPLUS_PREFIX})
@@ -174,8 +177,6 @@ if test "x${USE_AACPLUS}" = "xyes" ; then
             AACPLUS_INCFLAGS="-I${AACPLUS_INC_LOC}"
         fi
         AACPLUS_LDFLAGS="-L${AACPLUS_LIB_LOC} -laacplus"
-        # TODO: we have to define _FFTW3 only if libaacplus builded with fftw3f
-        AC_DEFINE( _FFTW3, 1, [libaacplus have to be builded with fftw3f library] )
         AC_MSG_RESULT( [found at ${CONFIG_AACPLUS_PREFIX}] )
     else
         AC_MSG_WARN( [not found, building without aacplus])