diff --git a/include/Makefile b/include/Makefile
index 48d273ce1..5e10824e1 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -10,7 +10,7 @@ INCS=	alloca.h ansi.h a.out.h ar.h assert.h configfile.h ctype.h \
 	syslog.h tar.h termcap.h termios.h time.h timers.h tools.h \
 	ttyent.h ucontext.h unistd.h utime.h utmp.h wchar.h wctype.h \
 	hgfs.h tzfile.h util.h fetch.h mpool.h ndbm.h db.h poll.h resolv.h \
-	memory.h paths.h libexec.h
+	memory.h paths.h libexec.h complex.h
 INCS+=	arpa/inet.h arpa/nameser.h
 INCS+=	minix/a.out.h minix/bitmap.h minix/callnr.h minix/cdrom.h \
 	minix/com.h minix/config.h minix/const.h minix/cpufeature.h \
diff --git a/include/complex.h b/include/complex.h
new file mode 100644
index 000000000..a393115e5
--- /dev/null
+++ b/include/complex.h
@@ -0,0 +1,69 @@
+/* $NetBSD: complex.h,v 1.1 2007/08/20 16:01:29 drochner Exp $ */
+
+#if __STDC_VERSION__ >= 199901L
+
+#define complex _Complex
+#define _Complex_I 1.0fi
+#define I _Complex_I
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+double creal(double complex);
+double cimag(double complex);
+double complex conj(double complex);
+float crealf(float complex);
+float cimagf(float complex);
+float complex conjf(float complex);
+
+#ifndef __minix
+#ifndef __LIBM0_SOURCE__
+/* avoid conflict with historical cabs(struct complex) */
+double cabs(double complex) __RENAME(__c99_cabs);
+float cabsf(float complex) __RENAME(__c99_cabsf);
+#endif
+#endif
+double carg(double complex);
+float cargf(float complex);
+
+double complex csqrt(double complex);
+double complex cexp(double complex);
+double complex clog(double complex);
+double complex cpow(double complex, double complex);
+
+double complex csin(double complex);
+double complex ccos(double complex);
+double complex ctan(double complex);
+double complex csinh(double complex);
+double complex ccosh(double complex);
+double complex ctanh(double complex);
+
+double complex casin(double complex);
+double complex cacos(double complex);
+double complex catan(double complex);
+double complex casinh(double complex);
+double complex cacosh(double complex);
+double complex catanh(double complex);
+
+float complex csqrtf(float complex);
+float complex cexpf(float complex);
+float complex clogf(float complex);
+float complex cpowf(float complex, float complex);
+
+float complex csinf(float complex);
+float complex ccosf(float complex);
+float complex ctanf(float complex);
+float complex csinhf(float complex);
+float complex ccoshf(float complex);
+float complex ctanhf(float complex);
+
+float complex casinf(float complex);
+float complex cacosf(float complex);
+float complex catanf(float complex);
+float complex casinhf(float complex);
+float complex cacoshf(float complex);
+float complex catanhf(float complex);
+
+__END_DECLS
+#endif