diff --git a/mozilla/configure b/mozilla/configure
index 5b7615abc5e..02d72a84e4f 100755
--- a/mozilla/configure
+++ b/mozilla/configure
@@ -12293,9 +12293,9 @@ else
 SYSTEM_PNG=
 fi
 
-    echo $ac_n "checking for png_get_acTl in -lpng""... $ac_c" 1>&6
-echo "configure:12298: checking for png_get_acTl in -lpng" >&5
-ac_lib_var=`echo png'_'png_get_acTl | sed 'y%./+-%__p_%'`
+    echo $ac_n "checking for png_get_acTL in -lpng""... $ac_c" 1>&6
+echo "configure:12298: checking for png_get_acTL in -lpng" >&5
+ac_lib_var=`echo png'_'png_get_acTL | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -12307,10 +12307,10 @@ cat > conftest.$ac_ext <<EOF
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
     builtin and then its argument prototype would still apply.  */
-char png_get_acTl();
+char png_get_acTL();
 
 int main() {
-png_get_acTl()
+png_get_acTL()
 ; return 0; }
 EOF
 if { (eval echo configure:12317: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then