diff --git a/include/extern.h b/include/extern.h
index e6a1fe4ab..6fb7e7eb6 100644
--- a/include/extern.h
+++ b/include/extern.h
@@ -3142,7 +3142,6 @@ extern int hide_privileges(boolean);
 #ifdef ENHANCED_SYMBOLS
 extern int glyphrep(const char *);
 extern char *mixed_to_utf8(char *buf, size_t bufsz, const char *str, int *);
-extern const char *mixed_to_glyphinfo(const char *str, glyph_info *gip);
 extern int match_glyph(char *);
 extern void dump_all_glyphids(FILE *fp);
 extern void fill_glyphid_cache(void);
@@ -3417,6 +3416,7 @@ extern char *decode_mixed(char *, const char *);
 extern void genl_putmixed(winid, int, const char *);
 extern void genl_display_file(const char *, boolean);
 extern boolean menuitem_invert_test(int, unsigned, boolean);
+extern const char *mixed_to_glyphinfo(const char *str, glyph_info *gip);
 
 /* ### windows.c ### */
 
diff --git a/src/utf8map.c b/src/utf8map.c
index a3424d812..136ba4c78 100644
--- a/src/utf8map.c
+++ b/src/utf8map.c
@@ -542,33 +542,6 @@ mixed_to_utf8(char *buf, size_t bufsz, const char *str, int *retflags)
     return buf;
 }
 
-/*
- * helper routine if a window port wants to extract the unicode
- * representation from a glyph representation in the string;
- * the returned string is the remainder of the string after
- * extracting the \GNNNNNNNN information.
- */
-const char *
-mixed_to_glyphinfo(const char *str, glyph_info *gip)
-{
-    int dcount, ggv;
-
-    if (!str || !gip)
-        return " ";
-
-    *gip = nul_glyphinfo;
-    if (*str == '\\' && *(str + 1) == 'G') {
-        if ((dcount = decode_glyph(str + 2, &ggv))) {
-            map_glyphinfo(0, 0, ggv, 0, gip);
-            /* 'str' is ready for the next loop iteration and
-                '*str' should not be copied at the end of this
-                iteration */
-            str += (dcount + 2);
-        }
-    }
-    return str;
-}
-
 void
 dump_all_glyphids(FILE *fp)
 {
diff --git a/src/windows.c b/src/windows.c
index 1c2c481e8..40c0e1d62 100644
--- a/src/windows.c
+++ b/src/windows.c
@@ -1563,4 +1563,31 @@ menuitem_invert_test(
     return TRUE;
 }
 
+/*
+ * helper routine if a window port wants to extract the unicode
+ * representation from a glyph representation in the string;
+ * the returned string is the remainder of the string after
+ * extracting the \GNNNNNNNN information.
+ */
+const char *
+mixed_to_glyphinfo(const char *str, glyph_info *gip)
+{
+    int dcount, ggv;
+
+    if (!str || !gip)
+        return " ";
+
+    *gip = nul_glyphinfo;
+    if (*str == '\\' && *(str + 1) == 'G') {
+        if ((dcount = decode_glyph(str + 2, &ggv))) {
+            map_glyphinfo(0, 0, ggv, 0, gip);
+            /* 'str' is ready for the next loop iteration and
+                '*str' should not be copied at the end of this
+                iteration */
+            str += (dcount + 2);
+        }
+    }
+    return str;
+}
+
 /*windows.c*/