diff --git a/m4/ax_matio.m4 b/m4/ax_matio.m4
index 905a1d309..d9092fc0b 100644
--- a/m4/ax_matio.m4
+++ b/m4/ax_matio.m4
@@ -1,6 +1,4 @@
 dnl Detect the MATIO Library.
-dnl We don't use the official M4 macro since it relies on the script gsl-config,
-dnl which does not work when cross-compiling.
 dnl
 dnl Copyright (C) 2012 Dynare Team
 dnl