8 files changed, 12 insertions, 23 deletions
diff --git a/src/supplemental/CMakeLists.txt b/src/supplemental/CMakeLists.txt
index 2dcf228e..9bbddc44 100644
--- a/src/supplemental/CMakeLists.txt
+++ b/src/supplemental/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright 2024 Staysail Systems, Inc. <info@staystail.tech>
+# Copyright 2025 Staysail Systems, Inc. <info@staystail.tech>
 #
 # This software is supplied under the terms of the MIT License, a
 # copy of which should be located in the distribution where this
@@ -11,7 +11,6 @@ nng_directory(supplemental)
 
 add_subdirectory(base64)
 add_subdirectory(http)
-add_subdirectory(sha1)
 add_subdirectory(tls)
 add_subdirectory(util)
 add_subdirectory(websocket)
diff --git a/src/supplemental/sha1/CMakeLists.txt b/src/supplemental/sha1/CMakeLists.txt
deleted file mode 100644
index de301b08..00000000
--- a/src/supplemental/sha1/CMakeLists.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-#
-# Copyright 2019 Staysail Systems, Inc. <info@staysail.tech>
-# Copyright 2017 Capitar IT Group BV <info@capitar.com>
-#
-# This software is supplied under the terms of the MIT License, a
-# copy of which should be located in the distribution where this
-# file was obtained (LICENSE.txt).  A copy of the license may also be
-# found online at https://opensource.org/licenses/MIT.
-#
-
-nng_sources_if(NNG_SUPP_SHA1 sha1.c sha1.h)
-nng_test(sha1_test)
diff --git a/src/supplemental/websocket/CMakeLists.txt b/src/supplemental/websocket/CMakeLists.txt
index 200aeee4..5d2f4b0c 100644
--- a/src/supplemental/websocket/CMakeLists.txt
+++ b/src/supplemental/websocket/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright 2019 Staysail Systems, Inc. <info@staysail.tech>
+# Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
 # Copyright 2017 Capitar IT Group BV <info@capitar.com>
 #
 # This software is supplied under the terms of the MIT License, a
@@ -9,7 +9,8 @@
 #
 
 if (NNG_SUPP_WEBSOCKET)
-    nng_sources(websocket.c websocket.h)
+    nng_sources(sha1.c sha1.h websocket.c websocket.h)
+    nng_test(sha1_test)
 else ()
     nng_sources(stub.c)
 endif ()
diff --git a/src/supplemental/sha1/sha1.c b/src/supplemental/websocket/sha1.c
index 228b497d..228b497d 100644
--- a/src/supplemental/sha1/sha1.c
+++ b/src/supplemental/websocket/sha1.c
diff --git a/src/supplemental/sha1/sha1.h b/src/supplemental/websocket/sha1.h
index adaa9a85..43b6f20d 100644
--- a/src/supplemental/sha1/sha1.h
+++ b/src/supplemental/websocket/sha1.h
@@ -1,5 +1,5 @@
 //
-// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
 // Copyright 2018 Capitar IT Group BV <info@capitar.com>
 //
 // This software is supplied under the terms of the MIT License, a
@@ -8,8 +8,8 @@
 // found online at https://opensource.org/licenses/MIT.
 //
 
-#ifndef NNG_SUPPLEMENTAL_SHA1_SHA1_H
-#define NNG_SUPPLEMENTAL_SHA1_SHA1_H
+#ifndef NNG_SUPPLEMENTAL_WEBSOCKET_SHA1_H
+#define NNG_SUPPLEMENTAL_WEBSOCKET_SHA1_H
 
 typedef struct {
 	uint32_t digest[5]; // resulting digest
@@ -23,4 +23,4 @@ extern void nni_sha1_update(nni_sha1_ctx *, const void *, size_t);
 extern void nni_sha1_final(nni_sha1_ctx *, uint8_t[20]);
 extern void nni_sha1(const void *, size_t, uint8_t[20]);
 
-#endif // NNG_SUPPLEMENTAL_SHA1_SHA1_H
+#endif // NNG_SUPPLEMENTAL_WEBSOCKET_SHA1_H
diff --git a/src/supplemental/sha1/sha1_test.c b/src/supplemental/websocket/sha1_test.c
index 505175b0..505175b0 100644
--- a/src/supplemental/sha1/sha1_test.c
+++ b/src/supplemental/websocket/sha1_test.c
diff --git a/src/supplemental/websocket/websocket.c b/src/supplemental/websocket/websocket.c
index 6053c5c2..9cb1a677 100644
--- a/src/supplemental/websocket/websocket.c
+++ b/src/supplemental/websocket/websocket.c
@@ -14,10 +14,11 @@
 #include <string.h>
 
 #include "core/nng_impl.h"
-#include "supplemental/base64/base64.h"
 #include "supplemental/http/http_api.h"
-#include "supplemental/sha1/sha1.h"
 
+#include "supplemental/base64/base64.h"
+
+#include "sha1.h"
 #include "websocket.h"
 
 // This should be removed or handled differently in the future.
diff --git a/src/supplemental/websocket/websocket_test.c b/src/supplemental/websocket/websocket_test.c
index 91e42601..30ebb3f5 100644
--- a/src/supplemental/websocket/websocket_test.c
+++ b/src/supplemental/websocket/websocket_test.c
@@ -11,7 +11,7 @@
 
 #include <nng/nng.h>
 
-#include "../sha1/sha1.h"
+#include "sha1.h"
 
 #include <nuts.h>