diff --git a/library/GNUmakefile.68k b/library/GNUmakefile.68k
index 512d960..a14ff2d 100644
--- a/library/GNUmakefile.68k
+++ b/library/GNUmakefile.68k
@@ -449,6 +449,7 @@ C_LIB = \
 	time_numbertostring.o \
 	time_strftime.o \
 	time_time.o \
+	time_tzset.o \
 	time_weekday.o \
 	uio_readv.o \
 	uio_writev.o \
diff --git a/library/include/time.h b/library/include/time.h
index 09b5636..47b9481 100644
--- a/library/include/time.h
+++ b/library/include/time.h
@@ -123,6 +123,7 @@ extern char * asctime_r(const struct tm *tm,char * buffer);
 extern char * ctime_r(const time_t *tptr,char * buffer);
 extern struct tm * gmtime_r(const time_t *t,struct tm * tm_ptr);
 extern struct tm * localtime_r(const time_t *t,struct tm * tm_ptr);
+extern void tzset(void);
 
 /****************************************************************************/
 
diff --git a/library/libc.gmk b/library/libc.gmk
index cf553aa..1a8cddd 100644
--- a/library/libc.gmk
+++ b/library/libc.gmk
@@ -337,6 +337,7 @@ C_LIB := \
 	time_numbertostring.o \
 	time_strftime.o \
 	time_time.o \
+	time_tzset.o \
 	time_weekday.o \
 	uio_readv.o \
 	uio_writev.o \
diff --git a/library/time_tzset.c b/library/time_tzset.c
new file mode 100644
index 0000000..ee47658
--- /dev/null
+++ b/library/time_tzset.c
@@ -0,0 +1,48 @@
+/*
+ * $Id: $
+ *
+ * :ts=4
+ *
+ * Portable ISO 'C' (1994) runtime library for the Amiga computer
+ * Copyright (c) 2002-2017 by Olaf Barthel <obarthel (at) gmx.net>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Neither the name of Olaf Barthel nor the names of contributors
+ *     may be used to endorse or promote products derived from this
+ *     software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _TIME_HEADERS_H
+#include "time_headers.h"
+#endif /* _TIME_HEADERS_H */
+
+#ifndef _LOCALE_HEADERS_H
+#include "locale_headers.h"
+#endif /* _LOCALE_HEADERS_H */
+
+/****************************************************************************/
+
+void
+tzset(void)
+{
+	/* For now, do nothing. */
+}