diff --git a/programs/winhlp32/winhelp.c b/programs/winhlp32/winhelp.c
index ebcd7c97cbd..7cb4a12b321 100644
--- a/programs/winhlp32/winhelp.c
+++ b/programs/winhlp32/winhelp.c
@@ -194,7 +194,7 @@ BOOL WINHELP_GetOpenFileName(LPSTR lpszFile, int len)
  *
  *           WINHELP_MessageBoxIDS_s
  */
-INT WINHELP_MessageBoxIDS_s(UINT ids_text, LPCSTR str, UINT ids_title, WORD type)
+static INT WINHELP_MessageBoxIDS_s(UINT ids_text, LPCSTR str, UINT ids_title, WORD type)
 {
     CHAR text[MAX_STRING_LEN];
     CHAR newtext[MAX_STRING_LEN + MAX_PATH];
@@ -1164,7 +1164,7 @@ struct index_data
  * WINHELP_IndexDlgProc
  *
  */
-INT_PTR CALLBACK WINHELP_IndexDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
+static INT_PTR CALLBACK WINHELP_IndexDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     static struct index_data* id;
     int sel;
@@ -1232,7 +1232,7 @@ INT_PTR CALLBACK WINHELP_IndexDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM
  * WINHELP_SearchDlgProc
  *
  */
-INT_PTR CALLBACK WINHELP_SearchDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
+static INT_PTR CALLBACK WINHELP_SearchDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     static struct index_data* id;
 
diff --git a/programs/winhlp32/winhelp.h b/programs/winhlp32/winhelp.h
index f06b0829230..feaf6379bbd 100644
--- a/programs/winhlp32/winhelp.h
+++ b/programs/winhlp32/winhelp.h
@@ -149,7 +149,6 @@ BOOL WINHELP_OpenHelpWindow(HLPFILE_PAGE* (*)(HLPFILE*, LONG, ULONG*),
 BOOL WINHELP_GetOpenFileName(LPSTR, int);
 BOOL WINHELP_CreateIndexWindow(BOOL);
 void WINHELP_DeleteBackSet(WINHELP_WINDOW*);
-INT  WINHELP_MessageBoxIDS_s(UINT, LPCSTR, UINT, WORD);
 HLPFILE* WINHELP_LookupHelpFile(LPCSTR lpszFile);
 HLPFILE_WINDOWINFO* WINHELP_GetWindowInfo(HLPFILE* hlpfile, LPCSTR name);
 void WINHELP_LayoutMainWindow(WINHELP_WINDOW* win);