diff --git a/include/unistd.h b/include/unistd.h
index ff541088..ee22b21b 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -215,6 +215,7 @@ void syncfs(int);
 #define _POSIX_REGEXP           1
 #define _POSIX_SAVED_IDS        1
 #define _POSIX_SHELL            1
+#define _POSIX_SPAWN            _POSIX_VERSION
 #define _POSIX_VDISABLE         0
 
 #define _POSIX_THREADS          _POSIX_VERSION
diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 4819ae6a..1f66031a 100644
--- a/src/conf/sysconf.c
+++ b/src/conf/sysconf.c
@@ -171,7 +171,7 @@ long sysconf(int name)
 		[_SC_REGEX_VERSION] = -1,
 		[_SC_SHELL] = 1,
 		[_SC_SIGNALS] = -1,
-		[_SC_SPAWN] = -1,
+		[_SC_SPAWN] = VER,
 		[_SC_SPORADIC_SERVER] = -1,
 		[_SC_THREAD_SPORADIC_SERVER] = -1,
 		[_SC_SYSTEM_DATABASE] = -1,