diff --git a/configure b/configure
index 0ee6b54e57..51d191ec5e 100755
--- a/configure
+++ b/configure
@@ -1688,7 +1688,7 @@ atrac1_decoder_select="mdct sinewin"
 atrac3_decoder_select="mdct"
 binkaudio_dct_decoder_select="mdct rdft dct sinewin"
 binkaudio_rdft_decoder_select="mdct rdft sinewin"
-cavs_decoder_select="golomb h264chroma mpegvideo"
+cavs_decoder_select="golomb h264chroma mpegvideo videodsp"
 comfortnoise_encoder_select="lpc"
 cook_decoder_select="mdct sinewin"
 cscd_decoder_select="lzo"
@@ -1772,8 +1772,8 @@ rv10_decoder_select="error_resilience h263_decoder"
 rv10_encoder_select="h263_encoder"
 rv20_decoder_select="error_resilience h263_decoder"
 rv20_encoder_select="h263_encoder"
-rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo"
-rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo"
+rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
+rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpegvideo videodsp"
 shorten_decoder_select="golomb"
 sipr_decoder_select="lsp"
 snow_decoder_select="dwt h264qpel rangecoder"
@@ -1783,7 +1783,7 @@ sonic_encoder_select="golomb"
 sonic_ls_encoder_select="golomb"
 svq1_decoder_select="mpegvideo"
 svq1_encoder_select="aandcttables mpegvideoenc"
-svq3_decoder_select="error_resilience golomb h264chroma h264dsp h264pred h264qpel mpegvideo"
+svq3_decoder_select="error_resilience golomb h264chroma h264dsp h264pred h264qpel mpegvideo videodsp"
 svq3_decoder_suggest="zlib"
 theora_decoder_select="vp3_decoder"
 tiff_decoder_suggest="zlib"
@@ -1810,7 +1810,7 @@ wmav2_encoder_select="mdct sinewin"
 wmavoice_decoder_select="lsp rdft dct mdct sinewin"
 wmv1_decoder_select="h263_decoder"
 wmv1_encoder_select="h263_encoder"
-wmv2_decoder_select="h263_decoder"
+wmv2_decoder_select="h263_decoder videodsp"
 wmv2_encoder_select="h263_encoder"
 wmv3_decoder_select="vc1_decoder"
 wmv3image_decoder_select="wmv3_decoder"
diff --git a/libavutil/avstring.c b/libavutil/avstring.c
index 788667e9d6..cf9be2a0d5 100644
--- a/libavutil/avstring.c
+++ b/libavutil/avstring.c
@@ -304,7 +304,7 @@ int av_isspace(int c)
 int av_isxdigit(int c)
 {
     c = av_tolower(c);
-    return av_isdigit(c) || (c >= 'a' && c <= 'z');
+    return av_isdigit(c) || (c >= 'a' && c <= 'f');
 }
 
 #ifdef TEST