diff --git a/configure b/configure
index 852550586..46a9edd20 100755
--- a/configure
+++ b/configure
@@ -4263,7 +4263,7 @@ fi
 # Detect OS
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether OS is FreeBSD" >&5
 $as_echo_n "checking whether OS is FreeBSD... " >&6; }
-if test "x$host_os" = "x*FreeBSD*"; then :
+if expr "$host_os" : ".*freebsd.*" > /dev/null; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
       LIBS="-lexecinfo $LIBS"
diff --git a/configure.ac b/configure.ac
index f27154560..22dd6d064 100644
--- a/configure.ac
+++ b/configure.ac
@@ -74,7 +74,7 @@ AC_ARG_ENABLE(qt-dbus,
 
 # Detect OS
 AC_MSG_CHECKING([whether OS is FreeBSD])
-AS_IF([test "x$host_os" = "x*FreeBSD*"],
+AS_IF([expr "$host_os" : ".*freebsd.*" > /dev/null],
       [AC_MSG_RESULT([yes])
       LIBS="-lexecinfo $LIBS"],
       [AC_MSG_RESULT([no])])