--- xmedcon-0.25.3/acinclude.m4
+++ xmedcon-0.25.3/acinclude.m4
@@ -22,7 +22,7 @@
     mdc_cv_glibsupport=no
   else
     GLIBSUPPORTED=1
-    if test x${prefix} == x/usr ; then
+    if test x${prefix} = x/usr ; then
       GLIBMDCETC=/etc
     elif test x${prefix} != xNONE ; then
       GLIBMDCETC=${prefix}/etc
@@ -44,7 +44,7 @@
 AC_DEFUN([MDC_CHECK_GUI],[
 AC_MSG_CHECKING([for GUI support])
 if test $1 -eq 1; then
-  if test x${prefix} == x/usr ; then
+  if test x${prefix} = x/usr ; then
     XMDCETC=/etc
   elif test x${prefix} != xNONE ; then
     XMDCETC=${prefix}/etc