1 files changed, 4 insertions, 1 deletions
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 200889a..3e4efc6 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -441,13 +441,16 @@ std::string cmSystemTools::ConvertToUnixOutputPath(const char* path)
   if(ret.find(" ") != std::string::npos)
     {
     std::string result = "";
+    char lastch = 1;
     for(const char* ch = ret.c_str(); *ch != '\0'; ++ch)
       {
-      if(*ch == ' ')
+	// if it is already escaped then don't try to escape it again
+      if(*ch == ' ' && lastch != '\\')
         {
         result += '\\';
         }
       result += *ch;
+      lastch = *ch;
       }
     ret = result;
     }