diff --git a/libc-test/semver/solarish.txt b/libc-test/semver/solarish.txt
index 2dcebd06e3399..057fafb92f1de 100644
--- a/libc-test/semver/solarish.txt
+++ b/libc-test/semver/solarish.txt
@@ -16,6 +16,7 @@ LIO_WAIT
 LIO_WRITE
 PIPE_BUF
 SIGEV_PORT
+_POSIX_VDISABLE
 aio_cancel
 aio_error
 aio_fsync
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index 64bedf88b73c9..aa0925480ed19 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -1871,6 +1871,8 @@ pub const _PC_FILESIZEBITS: ::c_int = 67;
 pub const _PC_XATTR_ENABLED: ::c_int = 100;
 pub const _PC_XATTR_EXISTS: ::c_int = 101;
 
+pub const _POSIX_VDISABLE: ::cc_t = 0;
+
 pub const _SC_ARG_MAX: ::c_int = 1;
 pub const _SC_CHILD_MAX: ::c_int = 2;
 pub const _SC_CLK_TCK: ::c_int = 3;