diff --git a/yatexadd.el b/yatexadd.el
index eab795b..b8f19c3 100644
--- a/yatexadd.el
+++ b/yatexadd.el
@@ -25,7 +25,7 @@
     (if (string= YaTeX-env-name "tabular*")
 	(setq width (concat "{" (YaTeX:read-length "Width: ") "}")))
     (setq loc (YaTeX:read-position "tb")
-	  bars (string-to-int
+	  bars (YaTeX-str2int
 		(YaTeX-read-string-or-skip
 		 "Number of columns(0 for default format): " "3")))
     (if (<= bars 0)
@@ -1511,7 +1511,7 @@
       command))
    ((= argp 2)
     (let ((argc
-	   (string-to-int
+	   (YaTeX-str2int
 	    (read-string-with-history "Number of arguments(Default 0): ")))
 	  (def (YaTeX-read-string-or-skip "Definition: "))
 	  (command (get 'YaTeX::newcommand 'command)))
diff --git a/yatexenv.el b/yatexenv.el
index 22cc43f..aab1d1f 100644
--- a/yatexenv.el
+++ b/yatexenv.el
@@ -43,7 +43,7 @@
        ((> n 1)
 	(re-search-backward andptn)	;Sure to find!
 	(while (re-search-backward "\\\\multicolumn{\\([0-9]+\\)}" bor t)
-	  (setq n (+ n (string-to-int
+	  (setq n (+ n (YaTeX-str2int
 			(buffer-substring (match-beginning 1)
 					  (match-end 1)))
 		     -1)))))
@@ -101,7 +101,7 @@
 	  (forward-list 1))
 	 ((equal elt ?*)		;*{N}{EXP} -> Repeat EXP N times
 	  (skip-chars-forward "^{" end)
-	  (setq cols (* (string-to-int
+	  (setq cols (* (YaTeX-str2int
 			 (buffer-substring
 			  (1+ (point))
 			  (progn (forward-list 1) (1- (point)))))
@@ -136,7 +136,7 @@
 	     ((eq type 'alignat)
 	      (max
 	       1
-	       (* 2 (string-to-int
+	       (* 2 (YaTeX-str2int
 		     (buffer-substring
 		      (point)
 		      (progn (up-list -1) (forward-list 1) (1- (point))))))))
diff --git a/yatexprc.el b/yatexprc.el
index a1eeb21..65eed1d 100644
--- a/yatexprc.el
+++ b/yatexprc.el
@@ -1149,7 +1149,7 @@
     (goto-char (setq b0 (match-beginning 0)))
     (skip-chars-forward "^0-9" (match-end 0))
     (setq error-line
-	  (string-to-int
+	  (YaTeX-str2int
 	   (buffer-substring
 	    (point)
 	    (progn (skip-chars-forward "0-9" (match-end 0)) (point))))
@@ -1189,7 +1189,7 @@
 	(if (eobp) (insert (this-command-keys))
 	  (error "No line number expression."))
       (goto-char (match-beginning 0))
-      (setq error-line (string-to-int
+      (setq error-line (YaTeX-str2int
 			(buffer-substring (match-beginning 1) (match-end 1)))
 	    error-file (expand-file-name
 			(YaTeX-get-error-file YaTeX-current-TeX-buffer)))