diff --git a/.ctags.d/langmap.ctags b/.ctags.d/langmap.ctags
new file mode 100644
index 0000000000..ef431ba2e4
--- /dev/null
+++ b/.ctags.d/langmap.ctags
@@ -0,0 +1,11 @@
+#
+# Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+#
+# Licensed under the Apache License 2.0 (the "License").  You may not use
+# this file except in compliance with the License.  You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+#
+
+--langmap=C:+.h
+--langmap=C:+.inc
diff --git a/Configurations/unix-Makefile.tmpl b/Configurations/unix-Makefile.tmpl
index 7ebca833f1..b13fb5dd48 100644
--- a/Configurations/unix-Makefile.tmpl
+++ b/Configurations/unix-Makefile.tmpl
@@ -1422,7 +1422,7 @@ test_ordinals:
 tags TAGS: FORCE build_generated
 	rm -f TAGS tags
 	-( cd $(SRCDIR); util/ctags.sh )
-	-etags `find . -name '*.[ch]' -o -name '*.pm'`
+	-etags `find . -name '*.[ch]' -o -name '*.pm' -o -name '*.inc'`
 
 providers/fips.checksum.new: providers/fips.module.sources.new
 	@which unifdef > /dev/null || \