--- a/intl/icu/source/i18n/decimfmt.cpp
+++ b/intl/icu/source/i18n/decimfmt.cpp
@@ -1709,16 +1709,24 @@ DecimalFormat::subformat(UnicodeString& 
             }
 
             // Output grouping separator if necessary.
             if (isGroupingPosition(i)) {
                 currentLength = appendTo.length();
                 appendTo.append(*grouping);
                 handler.addAttribute(kGroupingSeparatorField, currentLength, appendTo.length());
             }
+        } 
+
+        // This handles the special case of formatting 0. For zero only, we count the 
+        // zero to the left of the decimal point as one signficant digit. Ordinarily we 
+        // do not count any leading 0's as significant. If the number we are formatting 
+        // is not zero, then either sigCount or digits.getCount() will be non-zero. 
+        if (sigCount == 0 && digits.getCount() == 0) { 
+          sigCount = 1; 
         }
 
         // TODO(dlf): this looks like it was a bug, we marked the int field as ending
         // before the zero was generated.
         // Record field information for caller.
         // if (fieldPosition.getField() == NumberFormat::kIntegerField)
         //     fieldPosition.setEndIndex(appendTo.length());
 

--- a/intl/update-icu.sh
+++ b/intl/update-icu.sh
@@ -9,16 +9,25 @@
 # build with the Mozilla build tools for Windows. Check
 # http://bugs.icu-project.org/trac/ticket/9985
 # whether this has been addressed in the version you're updating to.
 # If not, obtain the patch "Make ICU build with Mozilla build for Windows" from
 # https://bugzilla.mozilla.org/show_bug.cgi?id=724533
 # and reapply it after running update-icu.sh (additional updates may be needed).
 # If the bug has been addressed, please delete this warning.
 
+# Warning
+# =======
+# The fix for ICU bug 10045 has been individually backported into this tree.
+# If you update ICU to a version that does not have this fix yet, obtain the
+# patch "Backported fix for formatting 0 with significant digits from ICU" from
+# https://bugzilla.mozilla.org/show_bug.cgi?id=853706
+# and reapply it after running update-icu.sh.
+# If you update ICU to a version that has the fix, please delete this warning.
+
 # Usage: update-icu.sh <URL of ICU SVN with release>
 # E.g., for ICU 50.1.1: update-icu.sh http://source.icu-project.org/repos/icu/icu/tags/release-50-1-1/
 
 if [ $# -lt 1 ]; then
   echo "Usage: update-icu.sh <URL of ICU SVN with release>"
   exit 1
 fi