1 files changed, 1 insertions, 1 deletions

diff --git a/src/cuchaz/enigma/mapping/ClassMapping.java b/src/cuchaz/enigma/mapping/ClassMapping.java
index bce16cc..6a89df7 100644
--- a/src/cuchaz/enigma/mapping/ClassMapping.java
+++ b/src/cuchaz/enigma/mapping/ClassMapping.java
@@ -255,7 +255,7 @@ public class ClassMapping implements Serializable, Comparable<ClassMapping>
                 {
                         methodMapping = createMethodMapping( obfName, obfSignature );
                 }
-                else
+                else if( methodMapping.getDeobfName() != null )
                 {
                         boolean wasRemoved = m_methodsByDeobf.remove( getMethodKey( methodMapping.getDeobfName(), methodMapping.getDeobfSignature() ) ) != null;
                         assert( wasRemoved );