diff --git a/htdocs/core/lib/product.lib.php b/htdocs/core/lib/product.lib.php
index 16bedc4d346..7048b8570c6 100644
--- a/htdocs/core/lib/product.lib.php
+++ b/htdocs/core/lib/product.lib.php
@@ -441,7 +441,7 @@ function measuring_units_string($unit,$measuring_style='')
 		$measuring_units[0] = $langs->transnoentitiesnoconv("WeightUnitkg");
 		$measuring_units[-3] = $langs->transnoentitiesnoconv("WeightUnitg");
 		$measuring_units[-6] = $langs->transnoentitiesnoconv("WeightUnitmg");
-		$measuring_units[98] = $langs->transnoentitiesnoconv("WeightUnitonce");
+		$measuring_units[98] = $langs->transnoentitiesnoconv("WeightUnitounce");
 		$measuring_units[99] = $langs->transnoentitiesnoconv("WeightUnitpound");
 	}
 	else if ($measuring_style == 'size')