diff --git a/src/os/win32/sigar_os.h b/src/os/win32/sigar_os.h
index d70a777c..861ff26e 100644
--- a/src/os/win32/sigar_os.h
+++ b/src/os/win32/sigar_os.h
@@ -173,6 +173,10 @@ typedef enum {
     SC_STATUS_PROCESS_INFO = 0
 } SC_STATUS_TYPE;
 
+#ifndef ERROR_DATATYPE_MISMATCH
+#define ERROR_DATATYPE_MISMATCH 1629L
+#endif
+
 #endif /* _MSC_VER */
 
 #include <iprtrmib.h>
diff --git a/src/os/win32/wmi.cpp b/src/os/win32/wmi.cpp
index d98df536..a816bbd9 100644
--- a/src/os/win32/wmi.cpp
+++ b/src/os/win32/wmi.cpp
@@ -22,8 +22,8 @@
 
 #include <windows.h>
 #include <objbase.h>
-#include <wbemidl.h>
 #include <comdef.h>
+#include <wbemidl.h>
 #include "sigar.h"
 
 #pragma comment(lib, "wbemuuid.lib")