diff --git a/mips-mcu/Cargo.toml b/mips-mcu/Cargo.toml
index fd3eebb..4b0da74 100644
--- a/mips-mcu/Cargo.toml
+++ b/mips-mcu/Cargo.toml
@@ -2,8 +2,8 @@
 name = "mips-mcu"
 description = "Low level access to MIPS MCU cores"
 categories = ["embedded", "hardware-support", "no-std"]
-keywords = ["mips", "register", "peripheral"]
-version = "0.3.0"
+keywords = ["mips", "pic32", "register", "peripheral"]
+version = "0.3.1"
 authors = ["Stephan <kiffie@mailbox.org>"]
 repository = "https://github.com/kiffie/pic32-rs"
 license = "MIT OR Apache-2.0"
diff --git a/mips-mcu/bin/libmipsmcu.a b/mips-mcu/bin/libmipsmcu.a
index 11190df..37214b2 100644
Binary files a/mips-mcu/bin/libmipsmcu.a and b/mips-mcu/bin/libmipsmcu.a differ
diff --git a/mips-mcu/bin/mips_irq.S b/mips-mcu/bin/mips_irq.S
index 1b9bbc3..6b41ad3 100644
--- a/mips-mcu/bin/mips_irq.S
+++ b/mips-mcu/bin/mips_irq.S
@@ -63,3 +63,14 @@ mips_restore_irq:
         nop
 .end mips_restore_irq
 
+# wait for interrupts
+#
+# void mips_wait(void)
+#
+.global mips_wait
+.ent mips_wait
+mips_wait:
+        wait
+        jr      ra
+        nop
+.end mips_wait
diff --git a/mips-mcu/src/interrupt.rs b/mips-mcu/src/interrupt.rs
index 5974233..8d3e37b 100644
--- a/mips-mcu/src/interrupt.rs
+++ b/mips-mcu/src/interrupt.rs
@@ -48,3 +48,16 @@ pub unsafe fn restore(previous_status: IrqSave) {
     }
     mips_restore_irq(previous_status)
 }
+
+/// Wait for interrupts
+///
+/// Use the MIPS `wait` instruction to wait for interrupts and to put the
+/// processor in a power saving mode.
+pub fn wait() {
+    extern "C" {
+        fn mips_wait();
+    }
+    unsafe {
+        mips_wait();
+    }
+}