diff --git a/raccourcis.sty b/raccourcis.sty
index 0b9cf0c..8bda870 100755
--- a/raccourcis.sty
+++ b/raccourcis.sty
@@ -33,9 +33,9 @@
 
 \newcommand{\intinfty}{\int_{-\infty}^{+\infty}}
 
-\renewcommand{\d}{\text{d}}
-\newcommand{\dd}[2]{\frac{\text{d} #1}{\text{d} #2}}
-\newcommand{\ddd}[2]{\frac{\text{d}^2 #1}{\text{d} {#2}^2}}
+\renewcommand{\d}{\mathrm{d}}
+\newcommand{\dd}[2]{\frac{\d #1}{\d #2}}
+\newcommand{\ddd}[2]{\frac{\d^2 #1}{\d {#2}^2}}
 \newcommand{\dr}[2]{\frac{\partial #1}{\partial #2}}
 \newcommand{\divv}{\text{div}}
 \newcommand{\grad}{\text{grad}}