diff --git a/src/exch.c b/src/exch.c
index c5c5552..19ff2d0 100644
--- a/src/exch.c
+++ b/src/exch.c
@@ -412,7 +412,7 @@ void visit_bank (void)
 	    mkchstr(chbuf, BUFSIZE, attr_normal, attr_normal | A_BOLD, 0, 1,
 		    getmaxx(curwin) / 2, &width_cursym, 1, "^{%s^}",
 		    lconvinfo.currency_symbol);
-	    chbuf_cursym = chstrdup(chbuf, BUFSIZE);
+	    chbuf_cursym = chstrdup(chbuf);
 
 	    mkchstr(chbuf, BUFSIZE, attr_normal, 0, 0, 1, getmaxx(curwin)
 		    - BANK_INPUT_COLS - width_cursym - 6, &width, 1,
@@ -470,7 +470,7 @@ void visit_bank (void)
 	    mkchstr(chbuf, BUFSIZE, attr_normal, attr_normal | A_BOLD, 0, 1,
 		    getmaxx(curwin) / 2, &width_cursym, 1, "^{%s^}",
 		    lconvinfo.currency_symbol);
-	    chbuf_cursym = chstrdup(chbuf, BUFSIZE);
+	    chbuf_cursym = chstrdup(chbuf);
 
 	    mkchstr(chbuf, BUFSIZE, attr_normal, 0, 0, 1, getmaxx(curwin)
 		    - BANK_INPUT_COLS - width_cursym - 6, &width, 1,
diff --git a/src/intf.c b/src/intf.c
index 03cf18f..94b1aa1 100644
--- a/src/intf.c
+++ b/src/intf.c
@@ -1241,7 +1241,7 @@ error:
 /***********************************************************************/
 // chstrdup: Duplicate a chtype buffer
 
-chtype *chstrdup (const chtype *restrict chstr, int chstrsize)
+chtype *chstrdup (const chtype *restrict chstr)
 {
     const chtype *p;
     int len;
@@ -1249,7 +1249,7 @@ chtype *chstrdup (const chtype *restrict chstr, int chstrsize)
 
 
     // Determine chstr length, including ending NUL
-    for (len = 1, p = chstr; *p != '\0' && len <= chstrsize; p++, len++)
+    for (len = 1, p = chstr; *p != '\0'; p++, len++)
 	;
 
     ret = xmalloc(len * sizeof(chtype));
diff --git a/src/intf.h b/src/intf.h
index 89c5791..ee53f33 100644
--- a/src/intf.h
+++ b/src/intf.h
@@ -412,7 +412,6 @@ extern int vmkchstr (chtype *restrict chbuf, int chbufsize, chtype attr_norm,
 /*
   Function:   chstrdup  - Duplicate a chtype string
   Parameters: chstr     - String to duplicate
-              chstrsize - Maximum number of chtype elements in chstr
   Returns:    chtype *  - Pointer to new (duplicated) string
 
   This function returns a new string of type chtype * that contains a
@@ -420,7 +419,7 @@ extern int vmkchstr (chtype *restrict chbuf, int chbufsize, chtype attr_norm,
   memory is not available, the program terminates with an "Out of memory"
   message.
 */
-extern chtype *chstrdup (const chtype *restrict chstr, int chstrsize);
+extern chtype *chstrdup (const chtype *restrict chstr);
 
 
 /*
diff --git a/src/move.c b/src/move.c
index 14fb280..353d73c 100644
--- a/src/move.c
+++ b/src/move.c
@@ -788,11 +788,11 @@ void merge_companies (map_val_t a, map_val_t b)
 
     mkchstr(chbuf, BUFSIZE, attr_highlight, 0, 0, 1, getmaxx(curwin) / 2,
 	    &width_aa, 1, "%s", company[aa].name);
-    chbuf_aa = chstrdup(chbuf, BUFSIZE);
+    chbuf_aa = chstrdup(chbuf);
 
     mkchstr(chbuf, BUFSIZE, attr_highlight, 0, 0, 1, getmaxx(curwin) / 2,
 	    &width_bb, 1, "%s", company[bb].name);
-    chbuf_bb = chstrdup(chbuf, BUFSIZE);
+    chbuf_bb = chstrdup(chbuf);
 
     mkchstr(chbuf, BUFSIZE, attr_normal, 0, 0, 1, getmaxx(curwin) / 2,
 	    &width, 1,
@@ -1032,7 +1032,7 @@ void adjust_values (void)
 
 		mkchstr(chbuf, BUFSIZE, attr_error_highlight, 0, 0, 1, w / 2,
 			&width_amt, 1, "%N", company[which].share_price);
-		chbuf_amt = chstrdup(chbuf, BUFSIZE);
+		chbuf_amt = chstrdup(chbuf);
 
 		mkchstr(chbuf, BUFSIZE, attr_error_normal, 0, 0, 1, w / 2,
 			&width, 1,