diff --git a/libc-test/semver/linux.txt b/libc-test/semver/linux.txt
index 4972bc7d..822405ab 100644
--- a/libc-test/semver/linux.txt
+++ b/libc-test/semver/linux.txt
@@ -189,6 +189,8 @@ B460800
 B500000
 B576000
 B921600
+BLKPBSZGET
+BLKSSZGET
 BOTHER
 BS0
 BS1
diff --git a/src/unix/linux_like/linux/arch/generic/mod.rs b/src/unix/linux_like/linux/arch/generic/mod.rs
index f3bed42b..399e78b8 100644
--- a/src/unix/linux_like/linux/arch/generic/mod.rs
+++ b/src/unix/linux_like/linux/arch/generic/mod.rs
@@ -135,3 +135,6 @@ pub const TIOCM_DSR: ::c_int = 0x100;
 
 pub const BOTHER: ::speed_t = 0o010000;
 pub const IBSHIFT: ::tcflag_t = 16;
+
+pub const BLKSSZGET: ::c_int = 0x1268;
+pub const BLKPBSZGET: ::c_int = 0x127B;
diff --git a/src/unix/linux_like/linux/arch/mips/mod.rs b/src/unix/linux_like/linux/arch/mips/mod.rs
index 1b327687..2b053a07 100644
--- a/src/unix/linux_like/linux/arch/mips/mod.rs
+++ b/src/unix/linux_like/linux/arch/mips/mod.rs
@@ -131,3 +131,6 @@ pub const TIOCM_DSR: ::c_int = 0x400;
 
 pub const BOTHER: ::speed_t = 0o010000;
 pub const IBSHIFT: ::tcflag_t = 16;
+
+pub const BLKSSZGET: ::c_int = 0x1268;
+pub const BLKPBSZGET: ::c_int = 0x127B;
diff --git a/src/unix/linux_like/linux/arch/powerpc/mod.rs b/src/unix/linux_like/linux/arch/powerpc/mod.rs
index b56121cd..034fa40d 100644
--- a/src/unix/linux_like/linux/arch/powerpc/mod.rs
+++ b/src/unix/linux_like/linux/arch/powerpc/mod.rs
@@ -109,3 +109,6 @@ pub const TIOCM_DSR: ::c_int = 0x100;
 
 pub const BOTHER: ::speed_t = 0o0037;
 pub const IBSHIFT: ::tcflag_t = 16;
+
+pub const BLKSSZGET: ::c_int = 0x1268;
+pub const BLKPBSZGET: ::c_int = 0x127B;
diff --git a/src/unix/linux_like/linux/arch/sparc/mod.rs b/src/unix/linux_like/linux/arch/sparc/mod.rs
index 1d384c83..74e36d65 100644
--- a/src/unix/linux_like/linux/arch/sparc/mod.rs
+++ b/src/unix/linux_like/linux/arch/sparc/mod.rs
@@ -123,3 +123,6 @@ pub const TIOCM_DSR: ::c_int = 0x100;
 
 pub const BOTHER: ::speed_t = 0x1000;
 pub const IBSHIFT: ::tcflag_t = 16;
+
+pub const BLKSSZGET: ::c_int = 0x20001268;
+pub const BLKPBSZGET: ::c_int = 0x2000127B;