diff --git a/device_mapper/ioctl/libdm-iface.c b/device_mapper/ioctl/libdm-iface.c
index dc7abb389..5800154f3 100644
--- a/device_mapper/ioctl/libdm-iface.c
+++ b/device_mapper/ioctl/libdm-iface.c
@@ -87,8 +87,6 @@ static int _version_checked = 0;
 static int _version_ok = 1;
 static unsigned _ioctl_buffer_double_factor = 0;
 
-const int _dm_compat = 0;
-
 /* *INDENT-OFF* */
 static const struct cmd_data _cmd_data_v4[] = {
 	{"create",	DM_DEV_CREATE,		{4, 0, 0}},
@@ -597,23 +595,9 @@ int dm_check_version(void)
 
 	_version_checked = 1;
 
-	if (_check_version(dmversion, sizeof(dmversion), _dm_compat))
+	if (_check_version(dmversion, sizeof(dmversion), 0))
 		return 1;
 
-	if (!_dm_compat)
-		goto_bad;
-
-	log_verbose("device-mapper ioctl protocol version %u failed. "
-		    "Trying protocol version 1.", _dm_version);
-	_dm_version = 1;
-	if (_check_version(dmversion, sizeof(dmversion), 0)) {
-		log_verbose("Using device-mapper ioctl protocol version 1");
-		return 1;
-	}
-
-	compat = "(compat)";
-
-      bad:
 	dm_get_library_version(libversion, sizeof(libversion));
 
 	log_error("Incompatible libdevmapper %s%s and kernel driver %s.",
diff --git a/libdm/ioctl/libdm-iface.c b/libdm/ioctl/libdm-iface.c
index 5bb385366..a579578c9 100644
--- a/libdm/ioctl/libdm-iface.c
+++ b/libdm/ioctl/libdm-iface.c
@@ -86,8 +86,6 @@ static int _version_checked = 0;
 static int _version_ok = 1;
 static unsigned _ioctl_buffer_double_factor = 0;
 
-const int _dm_compat = 0;
-
 /* *INDENT-OFF* */
 static const struct cmd_data _cmd_data_v4[] = {
 	{"create",	DM_DEV_CREATE,		{4, 0, 0}},
@@ -590,23 +588,9 @@ int dm_check_version(void)
 
 	_version_checked = 1;
 
-	if (_check_version(dmversion, sizeof(dmversion), _dm_compat))
+	if (_check_version(dmversion, sizeof(dmversion), 0))
 		return 1;
 
-	if (!_dm_compat)
-		goto_bad;
-
-	log_verbose("device-mapper ioctl protocol version %u failed. "
-		    "Trying protocol version 1.", _dm_version);
-	_dm_version = 1;
-	if (_check_version(dmversion, sizeof(dmversion), 0)) {
-		log_verbose("Using device-mapper ioctl protocol version 1");
-		return 1;
-	}
-
-	compat = "(compat)";
-
-      bad:
 	dm_get_library_version(libversion, sizeof(libversion));
 
 	log_error("Incompatible libdevmapper %s%s and kernel driver %s.",