diff --git a/htdocs/core/lib/functions2.lib.php b/htdocs/core/lib/functions2.lib.php
index 22b90ef52e0..d429192dbd9 100644
--- a/htdocs/core/lib/functions2.lib.php
+++ b/htdocs/core/lib/functions2.lib.php
@@ -635,7 +635,7 @@ function get_next_value($db,$mask,$table,$field,$where='',$objsoc='',$date='',$m
         if ($maskraz > 12) return 'ErrorBadMaskBadRazMonth';
 
         // Define posy, posm and reg
-        if ($maskraz > 1)	// if reset is not first month, we need month and year into mask
+        if ($maskraz >= 1)	// if reset is not first month, we need month and year into mask
         {
             if (preg_match('/^(.*)\{(y+)\}\{(m+)\}/i',$maskwithonlyymcode,$reg)) { $posy=2; $posm=3; }
             elseif (preg_match('/^(.*)\{(m+)\}\{(y+)\}/i',$maskwithonlyymcode,$reg)) { $posy=3; $posm=2; }