diff --git a/configure b/configure
index 2dec1f82..38d9ac40 100755
--- a/configure
+++ b/configure
@@ -416,9 +416,9 @@ test \$exitcode = 0") || {
       s,[$]LINENO.*,&-,
       t lineno
       b
-      : lineno
+      :lineno
       N
-      : loop
+      :loop
       s,[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\),\2\1\2,
       t loop
       s,-\n.*,,
@@ -2639,11 +2639,11 @@ _ACEOF
 } |
   sed '
      t clear
-     : clear
+     :clear
      s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
      t end
      /^ac_cv_env/!s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
-     : end' >>confcache
+     :end' >>confcache
 if diff $cache_file confcache >/dev/null 2>&1; then :; else
   if test -w $cache_file; then
     test "x$cache_file" != "x/dev/null" && echo "updating cache $cache_file"
@@ -2888,9 +2888,9 @@ echo X/"$0" |
       s,[$]LINENO.*,&-,
       t lineno
       b
-      : lineno
+      :lineno
       N
-      : loop
+      :loop
       s,[$]LINENO\([^'$as_cr_alnum'_].*\n\)\(.*\),\2\1\2,
       t loop
       s,-\n.*,,