diff --git a/build_odin.sh b/build_odin.sh
index aef3f2836..b00d33323 100755
--- a/build_odin.sh
+++ b/build_odin.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -eu
 
 GIT_SHA=$(git rev-parse --short HEAD)
diff --git a/src/gb/gb.h b/src/gb/gb.h
index 48d3c9aec..d09c7618b 100644
--- a/src/gb/gb.h
+++ b/src/gb/gb.h
@@ -90,6 +90,10 @@ extern "C" {
 	#error This operating system is not supported
 #endif
 
+#if defined(GB_SYSTEM_OPENBSD)
+#include <sys/wait.h>
+#endif
+
 #if defined(_MSC_VER)
 	#define GB_COMPILER_MSVC 1
 #elif defined(__GNUC__)