diff --git a/configure b/configure
index 06767bf652..a285eed9ea 100755
--- a/configure
+++ b/configure
@@ -7027,7 +7027,7 @@ FAAC_LIB=$_ld_faac
 AMR_NB=$_amr_nb
 AMR_NB_FIXED=$_amr_nb_fixed
 AMR_WB=$_amr_wb
-`echo $_libavcodecs | tr '[a-z]' '[A-Z]' | tr ' ' '\n' | sed 's/^/CONFIG_/;s/$/=yes/'`
+`echo $_libavcodecs | tr '[a-z] ' '[A-Z]\n' | sed 's/^/CONFIG_/;s/$/=yes/'`
 CONFIG_GPL=yes
 
 # --- Some stuff for autoconfigure ----
@@ -7374,7 +7374,7 @@ $_def_amr_nb_fixed
 $_def_amr_wb
 
 /* Use specific codecs from libavcodec */
-`echo $_libavcodecs | tr '[a-z]' '[A-Z]' | tr ' ' '\n' | sed 's/^/#define CONFIG_/;s/$/ 1/'`
+`echo $_libavcodecs | tr '[a-z] ' '[A-Z]\n' | sed 's/^/#define CONFIG_/;s/$/ 1/'`
 
 /* Use codec libs included in mplayer CVS / source dist: */
 $_def_mp3lib