diff --git a/CMakeLists.txt b/CMakeLists.txt
index b293edc..2b461a4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,8 +11,8 @@ endif (UNIX)
 
 if (WIN32)
 add_definitions(-D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE)
-set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -MTd")
-set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -MT")
+set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -MTd -EHsc")
+set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -MT -EHsc")
 endif (WIN32)
 
 include_directories("minilzo-2.09" "json11")
diff --git a/xcomreader.cpp b/xcomreader.cpp
index c74d28e..e2f74c8 100644
--- a/xcomreader.cpp
+++ b/xcomreader.cpp
@@ -692,10 +692,11 @@ namespace xcom
         xcom_io rdr{ std::move(b) };
         save.hdr = read_header(rdr);
         buffer<unsigned char> uncompressed_buf = decompress(rdr);
-        
+#ifdef _DEBUG
         FILE *fp = fopen("output.dat", "wb");
         fwrite(uncompressed_buf.buf.get(), 1, uncompressed_buf.length, fp);
         fclose(fp);
+#endif
         xcom_io uncompressed(std::move(uncompressed_buf));
         save.actors = read_actor_table(uncompressed);
         save.checkpoints = read_checkpoint_chunk_table(uncompressed);