diff --git a/form/frm_driver.c b/form/frm_driver.c
index 75656d69..ce690dcb 100644
--- a/form/frm_driver.c
+++ b/form/frm_driver.c
@@ -104,6 +104,14 @@ Perhaps at some time we will make this configurable at runtime.
 #define myINSNSTR(w, s, n) wide_winsnstr(w, s, n)
 #define myINNSTR(w, s, n)  wide_winnstr(w, s, n)
 #define myWCWIDTH(w, y, x) cell_width(w, y, x)
+
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 #else
 #define myADDNSTR(w, s, n) waddnstr(w, s, n)
 #define myINSNSTR(w, s, n) winsnstr(w, s, n)
diff --git a/menu/m_global.c b/menu/m_global.c
index 4ec08c52..ea9c91e7 100644
--- a/menu/m_global.c
+++ b/menu/m_global.c
@@ -249,6 +249,13 @@ _nc_Disconnect_Items(MENU *menu)
 |
 |   Return Values :  the width
 +--------------------------------------------------------------------------*/
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 MENU_EXPORT(int)
 _nc_Calculate_Text_Width(const TEXT *item /*FIXME: limit length */ )
 {
diff --git a/ncurses/tinfo/lib_acs.c b/ncurses/tinfo/lib_acs.c
index 4ede53f6..8ace3e61 100644
--- a/ncurses/tinfo/lib_acs.c
+++ b/ncurses/tinfo/lib_acs.c
@@ -257,6 +257,13 @@ _nc_init_acs(void)
 #endif
 
 #if !NCURSES_WCWIDTH_GRAPHICS
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 NCURSES_EXPORT(int)
 _nc_wacs_width(unsigned ch)
 {
diff --git a/test/ins_wide.c b/test/ins_wide.c
index c99b19d6..2f625258 100644
--- a/test/ins_wide.c
+++ b/test/ins_wide.c
@@ -104,6 +104,13 @@ legend(WINDOW *win, int level, Options state, wchar_t *buffer, int length)
     waddwstr(win, buffer);
     waddstr(win, ">");
 }
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 
 static int
 ColOf(const wchar_t *buffer, int length, int margin)
diff --git a/test/key_names.c b/test/key_names.c
index 69c95d63..a5126f34 100644
--- a/test/key_names.c
+++ b/test/key_names.c
@@ -33,6 +33,12 @@
 #include <test.priv.h>
 
 #if USE_WIDEC_SUPPORT
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
 
 static void
 usage(void)
diff --git a/test/ncurses.c b/test/ncurses.c
index 2aa78b22..8fc316f5 100644
--- a/test/ncurses.c
+++ b/test/ncurses.c
@@ -3955,6 +3955,13 @@ merge_wide_attr(cchar_t *dst, const cchar_t *src, attr_t attr, NCURSES_PAIRS_T p
  * characters (1024 total).  However, taking repeats and double-width cells
  * into account, use 256 characters for the page.
  */
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 static void
 show_paged_widechars(unsigned base,
 		     unsigned pagesize,
diff --git a/test/savescreen.c b/test/savescreen.c
index 4c767a52..38bdd701 100644
--- a/test/savescreen.c
+++ b/test/savescreen.c
@@ -163,6 +163,12 @@ get_command(int color, int which, int last)
 
     return ch;
 }
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
 
 static int
 dump_screen(char **files, int color, int which, int last, bool use_colors)
diff --git a/test/test_add_wchstr.c b/test/test_add_wchstr.c
index b1605046..3a91f042 100644
--- a/test/test_add_wchstr.c
+++ b/test/test_add_wchstr.c
@@ -190,6 +190,14 @@ legend(WINDOW *win, int level, Options state, wchar_t *buffer, int length)
     waddstr(win, ">");
 }
 
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
+
 static int
 ColOf(const wchar_t *buffer, int length, int margin)
 {
diff --git a/test/test_addwstr.c b/test/test_addwstr.c
index 22cacb91..3a8f83df 100644
--- a/test/test_addwstr.c
+++ b/test/test_addwstr.c
@@ -113,6 +113,13 @@ legend(WINDOW *win, int level, Options state, wchar_t *buffer, int length)
     waddstr(win, ">");
 }
 
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 static int
 ColOf(wchar_t *buffer, int length, int margin)
 {
diff --git a/test/view.c b/test/view.c
index b368f5b7..3cc03360 100644
--- a/test/view.c
+++ b/test/view.c
@@ -86,6 +86,13 @@ failed(const char *msg)
     ExitProgram(EXIT_FAILURE);
 }
 
+//MLA-begin
+#ifdef __MORPHOS__
+#define wcwidth morphos_wcwidth
+int wcwidth(wchar_t ucs);
+#endif
+//MLA-end
+
 static int
 ch_len(NCURSES_CH_T *src)
 {