diff --git a/latex/yssymbols.sty b/latex/yssymbols.sty
index b1c72a6..7a4f82a 100644
--- a/latex/yssymbols.sty
+++ b/latex/yssymbols.sty
@@ -24,6 +24,7 @@
 \def\prive{\setminus}
 \let\vec\overrightarrow
 \DeclareMathOperator{\card}{Card}
+\NewDocumentCommand\abs{m}{{\left|#1\right|}}
 
 \AtBeginDocument{
 \let\leq\leqslant