diff --git a/Makefile b/Makefile
index aa7192b..6edf8cd 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,9 @@ SRCS=	orch.c	\
 .if defined(.MAKE.OS) && ${.MAKE.OS} == "Linux"
 CFLAGS+=	-D_GNU_SOURCE
 .endif
+.if defined(.MAKE.OS) && ${.MAKE.OS} == "NetBSD"
+CWARNFLAGS+=	-Wno-conversion -Wno-maybe-uninitialized
+.endif
 
 SRCS+=	orch_compat.c
 
diff --git a/README.md b/README.md
index 14ad194..daf0373 100644
--- a/README.md
+++ b/README.md
@@ -14,5 +14,6 @@ requests and Issues are open on GitHub.
 orch(1) strives to be portable.  Currently supported platforms:
  - FreeBSD
  - OpenBSD
+ - NetBSD
  - macOS
  - Linux (tested on Ubuntu only)
diff --git a/orch.c b/orch.c
index 062f214..70cb586 100644
--- a/orch.c
+++ b/orch.c
@@ -22,6 +22,10 @@
 #define	POSIX_OPENPT_FLAGS	(O_RDWR | O_NOCTTY | O_CLOEXEC)
 #endif
 
+#ifndef __dead2
+#define	__dead2	__attribute__((noreturn))
+#endif
+
 extern char **environ;
 
 static void orch_exec(int argc, const char *argv[], int cmdsock);
@@ -31,7 +35,7 @@ static void orch_usept(pid_t sess, int termctl);
 static void orch_wait(int cmdsock);
 static void orch_release(int cmdsock);
 
-static void
+static void __dead2
 usage(const char *name, int error)
 {
 	FILE *f;
diff --git a/orch.h b/orch.h
index 5bb199d..b5c6d6c 100644
--- a/orch.h
+++ b/orch.h
@@ -51,6 +51,7 @@ int luaopen_orch(lua_State *);
 size_t strlcpy(char * __restrict dst, const char * __restrict src, size_t dsize);
 size_t strlcat(char * __restrict dst, const char * __restrict src, size_t dsize);
 #endif
-#if defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__)
+#if defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || \
+    defined(__NetBSD__)
 int tcsetsid(int tty, int sess);
 #endif
diff --git a/orch_compat.c b/orch_compat.c
index 09efe65..53508bc 100644
--- a/orch_compat.c
+++ b/orch_compat.c
@@ -97,7 +97,8 @@ strlcat(char * __restrict dst, const char * __restrict src, size_t dsize)
 	return(dlen + (src - osrc));    /* count does not include NUL */
 }
 #endif	/* __linux__ */
-#if defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__)
+#if defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || \
+    defined(__NetBSD__)
 /* Not associated with the above... incredibly simple. */
 
 int