diff --git a/Makefile.am b/Makefile.am
index 5b46344a..c7eebf45 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -262,14 +262,14 @@ update-map-file: libcoap-$(LIBCOAP_API_VERSION).map libcoap-$(LIBCOAP_API_VERSIO
 libcoap-$(LIBCOAP_API_VERSION).map: check_ctags $(libcoap_include_HEADERS)
 	( echo "VER_$(LIBCOAP_API_VERSION) {" ; \
 	echo "global:" ; \
-	$(CTAGS_PROG) $(CTAGS_IGNORE) -f - --c-kinds=p $(libcoap_include_HEADERS) | awk '/^coap_/ { print "  " $$1 ";" }' | sort -u ; \
+	$(CTAGS_PROG) $(CTAGS_IGNORE) -f - --c-kinds=p $(libcoap_include_HEADERS) | awk '/^coap_/ { print "  " $$1 ";" }' | LC_ALL=C sort -u ; \
 	echo "local:" ; \
 	echo "  *;" ; \
 	echo "};" ) > $(top_builddir)/$@.new
 	mv $(top_builddir)/$@.new $(top_builddir)/$@
 
 libcoap-$(LIBCOAP_API_VERSION).sym: check_ctags $(libcoap_include_HEADERS)
-	( $(CTAGS_PROG) $(CTAGS_IGNORE) -f - --c-kinds=p $(libcoap_include_HEADERS) | awk '/^coap_/ { print $$1 }' | sort -u ) \
+	( $(CTAGS_PROG) $(CTAGS_IGNORE) -f - --c-kinds=p $(libcoap_include_HEADERS) | awk '/^coap_/ { print $$1 }' | LC_ALL=C sort -u ) \
 	> $(top_builddir)/$@.new
 	mv $(top_builddir)/$@.new $(top_builddir)/$@
 
diff --git a/libcoap-3.map b/libcoap-3.map
index 4450a1ae..30a7438a 100644
--- a/libcoap-3.map
+++ b/libcoap-3.map
@@ -11,12 +11,12 @@ global:
   coap_add_option;
   coap_add_optlist_pdu;
   coap_add_resource;
+  coap_add_token;
   coap_address_equals;
   coap_address_get_port;
   coap_address_init;
   coap_address_set_port;
   coap_address_set_unix_domain;
-  coap_add_token;
   coap_async_get_app_data;
   coap_async_is_supported;
   coap_async_set_app_data;
@@ -32,8 +32,8 @@ global:
   coap_cache_get_pdu;
   coap_cache_ignore_options;
   coap_cache_set_app_data;
-  coap_cancel_observe;
   coap_can_exit;
+  coap_cancel_observe;
   coap_check_option;
   coap_cleanup;
   coap_clear_event_handler;
@@ -55,15 +55,15 @@ global:
   coap_context_set_max_token_size;
   coap_context_set_pki;
   coap_context_set_pki_root_cas;
-  coap_context_set_psk;
   coap_context_set_psk2;
+  coap_context_set_psk;
   coap_context_set_session_timeout;
   coap_debug_send_packet;
   coap_debug_set_packet_loss;
-  coap_decode_var_bytes;
   coap_decode_var_bytes8;
-  coap_delete_binary;
+  coap_decode_var_bytes;
   coap_delete_bin_const;
+  coap_delete_binary;
   coap_delete_cache_entry;
   coap_delete_cache_key;
   coap_delete_optlist;
@@ -81,8 +81,8 @@ global:
   coap_dtls_psk_is_supported;
   coap_dtls_rpk_is_supported;
   coap_dtls_set_log_level;
-  coap_encode_var_safe;
   coap_encode_var_safe8;
+  coap_encode_var_safe;
   coap_endpoint_set_default_mtu;
   coap_endpoint_str;
   coap_find_async;
@@ -122,16 +122,16 @@ global:
   coap_mcast_per_resource;
   coap_mcast_set_hops;
   coap_memory_init;
-  coap_new_binary;
   coap_new_bin_const;
+  coap_new_binary;
   coap_new_cache_entry;
   coap_new_client_session;
   coap_new_client_session_oscore;
   coap_new_client_session_oscore_pki;
   coap_new_client_session_oscore_psk;
   coap_new_client_session_pki;
-  coap_new_client_session_psk;
   coap_new_client_session_psk2;
+  coap_new_client_session_psk;
   coap_new_context;
   coap_new_endpoint;
   coap_new_error_response;
@@ -146,17 +146,17 @@ global:
   coap_opt_block_num;
   coap_opt_encode;
   coap_opt_encode_size;
+  coap_opt_length;
+  coap_opt_parse;
+  coap_opt_setheader;
+  coap_opt_size;
+  coap_opt_value;
   coap_option_filter_clear;
   coap_option_filter_get;
   coap_option_filter_set;
   coap_option_filter_unset;
   coap_option_iterator_init;
   coap_option_next;
-  coap_opt_length;
-  coap_opt_parse;
-  coap_opt_setheader;
-  coap_opt_size;
-  coap_opt_value;
   coap_oscore_is_supported;
   coap_package_build;
   coap_package_name;
@@ -191,15 +191,15 @@ global:
   coap_resource_get_userdata;
   coap_resource_init;
   coap_resource_notify_observers;
-  coap_resource_proxy_uri_init;
   coap_resource_proxy_uri_init2;
+  coap_resource_proxy_uri_init;
   coap_resource_release_userdata_handler;
   coap_resource_set_dirty;
   coap_resource_set_get_observable;
   coap_resource_set_mode;
   coap_resource_set_userdata;
-  coap_resource_unknown_init;
   coap_resource_unknown_init2;
+  coap_resource_unknown_init;
   coap_response_phrase;
   coap_send;
   coap_send_ack;
diff --git a/libcoap-3.sym b/libcoap-3.sym
index c7be8511..ffb785ae 100644
--- a/libcoap-3.sym
+++ b/libcoap-3.sym
@@ -9,12 +9,12 @@ coap_add_data_large_response
 coap_add_option
 coap_add_optlist_pdu
 coap_add_resource
+coap_add_token
 coap_address_equals
 coap_address_get_port
 coap_address_init
 coap_address_set_port
 coap_address_set_unix_domain
-coap_add_token
 coap_async_get_app_data
 coap_async_is_supported
 coap_async_set_app_data
@@ -30,8 +30,8 @@ coap_cache_get_by_pdu
 coap_cache_get_pdu
 coap_cache_ignore_options
 coap_cache_set_app_data
-coap_cancel_observe
 coap_can_exit
+coap_cancel_observe
 coap_check_option
 coap_cleanup
 coap_clear_event_handler
@@ -60,8 +60,8 @@ coap_debug_send_packet
 coap_debug_set_packet_loss
 coap_decode_var_bytes
 coap_decode_var_bytes8
-coap_delete_binary
 coap_delete_bin_const
+coap_delete_binary
 coap_delete_cache_entry
 coap_delete_cache_key
 coap_delete_optlist
@@ -120,8 +120,8 @@ coap_malloc_type
 coap_mcast_per_resource
 coap_mcast_set_hops
 coap_memory_init
-coap_new_binary
 coap_new_bin_const
+coap_new_binary
 coap_new_cache_entry
 coap_new_client_session
 coap_new_client_session_oscore
@@ -144,17 +144,17 @@ coap_new_uri
 coap_opt_block_num
 coap_opt_encode
 coap_opt_encode_size
+coap_opt_length
+coap_opt_parse
+coap_opt_setheader
+coap_opt_size
+coap_opt_value
 coap_option_filter_clear
 coap_option_filter_get
 coap_option_filter_set
 coap_option_filter_unset
 coap_option_iterator_init
 coap_option_next
-coap_opt_length
-coap_opt_parse
-coap_opt_setheader
-coap_opt_size
-coap_opt_value
 coap_oscore_is_supported
 coap_package_build
 coap_package_name