diff --git a/CMake/Platforms/WindowsCache.cmake b/CMake/Platforms/WindowsCache.cmake
index e056ad0d9e76fc..d6dc5a0fa82896 100644
--- a/CMake/Platforms/WindowsCache.cmake
+++ b/CMake/Platforms/WindowsCache.cmake
@@ -54,14 +54,11 @@ if(NOT UNIX)
     set(HAVE_TERMIOS_H 0)
     set(HAVE_TERMIO_H 0)
     set(HAVE_TIME_H 1)
-    set(HAVE_UNISTD_H 0)
     set(HAVE_UTIME_H 0)
 
     set(HAVE_SOCKET 1)
     set(HAVE_SELECT 1)
     set(HAVE_STRDUP 1)
-    set(HAVE_STRTOK_R 0)
-    set(HAVE_STRCASECMP 0)
     set(HAVE_STRICMP 1)
     set(HAVE_STRCMPI 1)
     set(HAVE_GETTIMEOFDAY 0)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3d11fc593530a7..156fe790392dcb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1293,6 +1293,8 @@ if(WIN32)
 
   if(NOT HAVE_MINGW_ORIGINAL)
     list(APPEND CURL_LIBS "bcrypt")
+  else()
+    set(HAVE_FTRUNCATE OFF)
   endif()
 endif()