diff --git a/include/winnt.h b/include/winnt.h
index 4bd7387..dc6b7cd 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -139,6 +139,32 @@
 
 #endif  /* __WINE__ */
 
+/* ifdef _x86_ ... */
+typedef struct _LDT_ENTRY {
+    WORD	LimitLow;
+    WORD	BaseLow;
+    union {
+	struct {
+	    BYTE	BaseMid;
+	    BYTE	Flags1;/*Declare as bytes to avoid alignment problems */
+	    BYTE	Flags2; 
+	    BYTE	BaseHi;
+	} Bytes;
+	struct {
+	    DWORD	BaseMid		: 8;
+	    DWORD	Type		: 5;
+	    DWORD	Dpl		: 2;
+	    DWORD	Pres		: 1;
+	    DWORD	LimitHi		: 4;
+	    DWORD	Sys		: 1;
+	    DWORD	Reserved_0	: 1;
+	    DWORD	Default_Big	: 1;
+	    DWORD	Granularity	: 1;
+	    DWORD	BaseHi		: 8;
+	} Bits;
+    } HighWord;
+} LDT_ENTRY, *LPLDT_ENTRY;
+
 /*
  * Exception codes
  */
@@ -255,9 +281,9 @@
 typedef LONG (*PTOP_LEVEL_EXCEPTION_FILTER)(PEXCEPTION_POINTERS ExceptionInfo);
 typedef PTOP_LEVEL_EXCEPTION_FILTER LPTOP_LEVEL_EXCEPTION_FILTER;
 
-DWORD UnhandledExceptionFilter( PEXCEPTION_POINTERS epointers );
+DWORD WINAPI UnhandledExceptionFilter( PEXCEPTION_POINTERS epointers );
 LPTOP_LEVEL_EXCEPTION_FILTER
-SetUnhandledExceptionFilter( LPTOP_LEVEL_EXCEPTION_FILTER filter );
+WINAPI SetUnhandledExceptionFilter( LPTOP_LEVEL_EXCEPTION_FILTER filter );
 
 /* Language IDs */