Index: svtools/source/numbers/zformat.cxx
===================================================================
--- svtools/source/numbers/zformat.cxx	(revision 271264)
+++ svtools/source/numbers/zformat.cxx	(working copy)
@@ -57,6 +57,7 @@
 #include "numhead.hxx"
 #include <unotools/digitgroupingiterator.hxx>
 #include "nfsymbol.hxx"
+#include <vcl/svapp.hxx>
 using namespace svt;
 
 namespace {
@@ -2434,6 +2435,15 @@
             break;
         }
     }
+
+    // Add LRM before minus sign if RTL
+    // The Unicode standard places a "minus/hyphen" to the right of a number,
+    // but in practice, Hebrew and Arabic users put a minus to the left of a number
+
+    bool bRtl = Application::GetSettings().GetLayoutRTL();
+    sal_Unicode LRM = 0x200E;
+    if (OutString.GetBuffer()[0] == '-' && bRtl)
+	    OutString.Insert(LRM, 0);
     return bRes;
 }