diff --git a/include/imm.h b/include/imm.h
index d8f1e4b..89473ed 100644
--- a/include/imm.h
+++ b/include/imm.h
@@ -28,6 +28,15 @@
 typedef HANDLE HIMC;
 typedef HANDLE HIMCC;
 
+typedef struct tagREGISTERWORDA {
+    LPSTR lpReading;
+    LPSTR lpWord;
+} REGISTERWORDA, *PREGISTERWORDA, *NPREGISTERWORDA, *LPREGISTERWORDA;
+
+typedef struct tagREGISTERWORDW {
+    LPWSTR lpReading;
+    LPWSTR lpWord;
+} REGISTERWORDW, *PREGISTERWORDW, *NPREGISTERWORDW, *LPREGISTERWORDW;
 
 typedef int (CALLBACK *REGISTERWORDENUMPROCA)(LPCSTR, DWORD, LPCSTR, LPVOID);
 typedef int (CALLBACK *REGISTERWORDENUMPROCW)(LPCWSTR, DWORD, LPCWSTR, LPVOID);