diff --git a/cmake/Modules/winconf-mingw.cmake b/cmake/Modules/winconf-mingw.cmake
index 70d7ac00a..755742257 100644
--- a/cmake/Modules/winconf-mingw.cmake
+++ b/cmake/Modules/winconf-mingw.cmake
@@ -1,7 +1,7 @@
 if (STACKTRACE)
-    if ("${WINXXBITS}" NOT STREQUAL "Win64")
+    if (NOT "${WINXXBITS}" STREQUAL "Win64")
         add_compile_options(-fno-omit-frame-pointer)
-    endif ("${WINXXBITS}" NOT STREQUAL "Win64")
+    endif (NOT "${WINXXBITS}" STREQUAL "Win64")
     link_libraries(libdbghelp  -Wl,--export-all-symbols)
 endif (STACKTRACE)
 
diff --git a/cmake/Modules/winconf.cmake b/cmake/Modules/winconf.cmake
index 6976657f8..7e178c123 100644
--- a/cmake/Modules/winconf.cmake
+++ b/cmake/Modules/winconf.cmake
@@ -7,7 +7,6 @@ list(APPEND CMAKE_LIBRARY_PATH "$ENV{LIB}")
 set(LibtorrentRasterbar_USE_STATIC_LIBS True)
 set(LibtorrentRasterbar_CUSTOM_DEFINITIONS
     -DBOOST_ALL_NO_LIB -DBOOST_ASIO_HASH_MAP_BUCKETS=1021
-    -DBOOST_ASIO_SEPARATE_COMPILATION
     -DBOOST_EXCEPTION_DISABLE
     -DBOOST_SYSTEM_STATIC_LINK=1
     -DTORRENT_USE_OPENSSL
diff --git a/src/base/utils/misc.h b/src/base/utils/misc.h
index 31e6fb3a7..4aa57c8ca 100644
--- a/src/base/utils/misc.h
+++ b/src/base/utils/misc.h
@@ -36,7 +36,7 @@
 #include <Windows.h>
 #endif
 
-class QString;
+#include <QString>
 
 enum class ShutdownDialogAction;