diff --git a/lib/Makefile.am b/lib/Makefile.am
index aaee7167..21900733 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -152,6 +152,8 @@ libshadow_la_SOURCES = \
 	string/sprintf/xasprintf.h \
 	string/strcpy/stpecpy.c \
 	string/strcpy/stpecpy.h \
+	string/strcpy/strncat.c \
+	string/strcpy/strncat.h \
 	string/strcpy/strncpy.c \
 	string/strcpy/strncpy.h \
 	string/strcpy/strtcpy.c \
diff --git a/lib/string/strcpy/strncat.c b/lib/string/strcpy/strncat.c
new file mode 100644
index 00000000..d55f1729
--- /dev/null
+++ b/lib/string/strcpy/strncat.c
@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "string/strcpy/strncat.h"
diff --git a/lib/string/strcpy/strncat.h b/lib/string/strcpy/strncat.h
new file mode 100644
index 00000000..6bb9907b
--- /dev/null
+++ b/lib/string/strcpy/strncat.h
@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRING_STRCPY_STRNCAT_H_
+#define SHADOW_INCLUDE_LIB_STRING_STRCPY_STRNCAT_H_
+
+
+#include <config.h>
+
+#include <string.h>
+
+#include "sizeof.h"
+
+
+#define STRNCAT(dst, src)  strncat(dst, src, NITEMS(src))
+
+
+#endif  // include guard