diff --git a/include/winbase.h b/include/winbase.h
index 2c97d4b847b..0011c53973c 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -605,6 +605,19 @@ typedef struct _PROCESS_INFORMATION{
 	DWORD		dwThreadId;
 } PROCESS_INFORMATION, *PPROCESS_INFORMATION, *LPPROCESS_INFORMATION;
 
+typedef struct _TIME_DYNAMIC_ZONE_INFORMATION
+{
+    LONG Bias;
+    WCHAR StandardName[32];
+    SYSTEMTIME StandardDate;
+    LONG StandardBias;
+    WCHAR DaylightName[32];
+    SYSTEMTIME DaylightDate;
+    LONG DaylightBias;
+    WCHAR TimeZoneKeyName[128];
+    BOOLEAN DynamicDaylightTimeDisabled;
+} DYNAMIC_TIME_ZONE_INFORMATION, *PDYNAMIC_TIME_ZONE_INFORMATION;
+
 typedef struct _TIME_ZONE_INFORMATION{
         LONG Bias;
         WCHAR StandardName[32];
@@ -1553,6 +1566,7 @@ WINBASEAPI DWORD       WINAPI GetDllDirectoryW(DWORD,LPWSTR);
 WINBASEAPI UINT        WINAPI GetDriveTypeA(LPCSTR);
 WINBASEAPI UINT        WINAPI GetDriveTypeW(LPCWSTR);
 #define                       GetDriveType WINELIB_NAME_AW(GetDriveType)
+WINBASEAPI DWORD       WINAPI GetDynamicTimeZoneInformation(PDYNAMIC_TIME_ZONE_INFORMATION);
 WINBASEAPI LPSTR       WINAPI GetEnvironmentStringsA(void);
 WINBASEAPI LPWSTR      WINAPI GetEnvironmentStringsW(void);
 #define                       GetEnvironmentStrings WINELIB_NAME_AW(GetEnvironmentStrings)
@@ -1964,6 +1978,7 @@ WINBASEAPI BOOL        WINAPI SetDefaultCommConfigW(LPCWSTR,LPCOMMCONFIG,DWORD);
 WINBASEAPI BOOL        WINAPI SetDllDirectoryA(LPCSTR);
 WINBASEAPI BOOL        WINAPI SetDllDirectoryW(LPCWSTR);
 #define                       SetDllDirectory WINELIB_NAME_AW(SetDllDirectory)
+WINBASEAPI BOOL        WINAPI SetDynamicTimeZoneInformation(CONST DYNAMIC_TIME_ZONE_INFORMATION*);
 WINBASEAPI BOOL        WINAPI SetEndOfFile(HANDLE);
 WINBASEAPI BOOL        WINAPI SetEnvironmentVariableA(LPCSTR,LPCSTR);
 WINBASEAPI BOOL        WINAPI SetEnvironmentVariableW(LPCWSTR,LPCWSTR);