diff --git a/stepmania/src/RageFileDriverDeflate.cpp b/stepmania/src/RageFileDriverDeflate.cpp
index 617ef42321..c59ae5c67d 100644
--- a/stepmania/src/RageFileDriverDeflate.cpp
+++ b/stepmania/src/RageFileDriverDeflate.cpp
@@ -105,8 +105,6 @@ int RageFileObjInflate::ReadInternal( void *buf, size_t bytes )
 				SetError( m_pFile->GetError() );
 				return -1;
 			}
-			if( got == 0 )
-				break;
 
 			decomp_buf_avail = got;
 		}
@@ -126,6 +124,9 @@ int RageFileObjInflate::ReadInternal( void *buf, size_t bytes )
 		case Z_MEM_ERROR:
 			SetError( "out of memory" );
 			return -1;
+		case Z_BUF_ERROR:
+			SetError( "file truncated" );
+			return -1;
 		case Z_STREAM_END:
 			done = true;
 			break;