diff --git a/m4/ax_slicot.m4 b/m4/ax_slicot.m4
index 6fa6e95c5..921bc0945 100644
--- a/m4/ax_slicot.m4
+++ b/m4/ax_slicot.m4
@@ -5,7 +5,7 @@ dnl
 dnl AX_SLICOT([matlab])
 dnl AX_SLICOT([octave])
 dnl
-dnl Copyright © 2012 Dynare Team
+dnl Copyright © 2012-2019 Dynare Team
 dnl
 dnl This file is part of Dynare.
 dnl
@@ -40,7 +40,7 @@ AC_DEFUN([AX_SLICOT],
   ac_save_LDFLAGS="$LDFLAGS"
   LDFLAGS_SAVED="$LDFLAGS"
 
-  AC_F77_FUNC(sb02od)
+  AC_FC_FUNC(sb02od)
 
   if test "$1" = matlab; then
     LDFLAGS="$MATLAB_LDFLAGS_NOMAP $LDFLAGS_SLICOT"
diff --git a/mex/build/matlab/configure.ac b/mex/build/matlab/configure.ac
index 95dc31b59..eeee28163 100644
--- a/mex/build/matlab/configure.ac
+++ b/mex/build/matlab/configure.ac
@@ -46,7 +46,7 @@ case ${host_os} in
 esac
 
 CFLAGS="$MATLAB_CFLAGS -Wall -Wno-parentheses"
-FCLAGS="$MATLAB_FCFLAGS -Wall"
+FCFLAGS="$MATLAB_FCFLAGS -Wall"
 CXXFLAGS="$MATLAB_CXXFLAGS -Wall -Wno-parentheses -Wold-style-cast"
 
 AC_PROG_FC