diff --git a/jsons/1.7.2-rel.json b/jsons/1.7.2-rel.json
index 3af7050611..c3e3cec979 100644
--- a/jsons/1.7.2-rel.json
+++ b/jsons/1.7.2-rel.json
@@ -57,6 +57,9 @@
     {
       "name": "net.sf.jopt-simple:jopt-simple:4.5"
     },
+    {
+      "name": "lzma:lzma:0.0.1"
+    },
     {
       "name": "com.paulscode:codecjorbis:20101023"
     },
diff --git a/src/main/java/cpw/mods/fml/common/asm/transformers/deobf/FMLDeobfuscatingRemapper.java b/src/main/java/cpw/mods/fml/common/asm/transformers/deobf/FMLDeobfuscatingRemapper.java
index 253aa26ff7..ebc7a8dbfa 100644
--- a/src/main/java/cpw/mods/fml/common/asm/transformers/deobf/FMLDeobfuscatingRemapper.java
+++ b/src/main/java/cpw/mods/fml/common/asm/transformers/deobf/FMLDeobfuscatingRemapper.java
@@ -278,7 +278,10 @@ public class FMLDeobfuscatingRemapper extends Remapper {
         {
             return typeName;
         }
-
+        if (classNameBiMap.containsKey(typeName))
+        {
+            return classNameBiMap.get(typeName);
+        }
         int dollarIdx = typeName.indexOf('$');
         String realType = dollarIdx > -1 ? typeName.substring(0, dollarIdx) : typeName;
         String subType = dollarIdx > -1 ? typeName.substring(dollarIdx+1) : "";
@@ -294,6 +297,11 @@ public class FMLDeobfuscatingRemapper extends Remapper {
         {
             return typeName;
         }
+
+        if (classNameBiMap.containsValue(typeName))
+        {
+            return classNameBiMap.inverse().get(typeName);
+        }
         int dollarIdx = typeName.indexOf('$');
         String realType = dollarIdx > -1 ? typeName.substring(0, dollarIdx) : typeName;
         String subType = dollarIdx > -1 ? typeName.substring(dollarIdx+1) : "";