diff --git a/bin/build.py b/bin/build.py
index 2b343e8c6..a71bea8b4 100644
--- a/bin/build.py
+++ b/bin/build.py
@@ -29,7 +29,7 @@ Import('env')
 
 config_env = env.Clone()
 
-config_variables = '''#!/bin/sh
+config_variables = '''#!/bin/bash
 
 ## variables
 
diff --git a/configure b/configure
index d609ba421..a04bb27a0 100755
--- a/configure
+++ b/configure
@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/bash
 
 python scons/scons.py --implicit-deps-changed configure "$@"
diff --git a/run_tests b/run_tests
index 27282980a..a7dbc5685 100755
--- a/run_tests
+++ b/run_tests
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 failures=0