--- a/layout/generic/nsImageMap.cpp
+++ b/layout/generic/nsImageMap.cpp
@@ -146,29 +146,31 @@ void Area::ParseCoords(const nsAString& 
 
     /*
      * Nothing in an empty list
      */
     mNumCoords = 0;
     mCoords = nsnull;
     if (*cp == '\0')
     {
+      nsMemory::Free(cp);
       return;
     }
 
     /*
      * Skip beginning whitespace, all whitespace is empty list.
      */
     n_str = cp;
     while (is_space(*n_str))
     {
       n_str++;
     }
     if (*n_str == '\0')
     {
+      nsMemory::Free(cp);
       return;
     }
 
     /*
      * Make a pass where any two numbers separated by just whitespace
      * are given a comma separator.  Count entries while passing.
      */
     cnt = 0;
@@ -243,16 +245,17 @@ void Area::ParseCoords(const nsAString& 
     cnt++;
 
     /*
      * Allocate space for the coordinate array.
      */
     value_list = new nscoord[cnt];
     if (!value_list)
     {
+      nsMemory::Free(cp);
       return;
     }
 
     /*
      * Second pass to copy integer values into list.
      */
     tptr = cp;
     for (i=0; i<cnt; i++)
@@ -285,17 +288,17 @@ void Area::ParseCoords(const nsAString& 
         *ptr = ',';
         tptr = ptr + 1;
       }
     }
 
     mNumCoords = cnt;
     mCoords = value_list;
 
-    NS_Free(cp);
+    nsMemory::Free(cp);
   }
 }
 
 void Area::HasFocus(PRBool aHasFocus)
 {
   mHasFocus = aHasFocus;
 }