diff --git a/poincare/include/poincare/norm_cdf.h b/poincare/include/poincare/norm_cdf.h
index 19ef45c94..7a92ce7e7 100644
--- a/poincare/include/poincare/norm_cdf.h
+++ b/poincare/include/poincare/norm_cdf.h
@@ -1,5 +1,5 @@
-#ifndef POINCARE_NORMCDF_H
-#define POINCARE_NORMCDF_H
+#ifndef POINCARE_NORM_CDF_H
+#define POINCARE_NORM_CDF_H
 
 #include <poincare/approximation_helper.h>
 #include <poincare/expression.h>
diff --git a/poincare/include/poincare/norm_cdf2.h b/poincare/include/poincare/norm_cdf2.h
index a6e2d183d..c2e2e6587 100644
--- a/poincare/include/poincare/norm_cdf2.h
+++ b/poincare/include/poincare/norm_cdf2.h
@@ -1,5 +1,5 @@
-#ifndef POINCARE_NORMCDF2_H
-#define POINCARE_NORMCDF2_H
+#ifndef POINCARE_NORM_CDF2_H
+#define POINCARE_NORM_CDF2_H
 
 #include <poincare/approximation_helper.h>
 #include <poincare/expression.h>