diff --git a/c/bootstrap b/c/bootstrap
index 6a1e814a..7e61b828 100755
--- a/c/bootstrap
+++ b/c/bootstrap
@@ -1,3 +1,3 @@
 #!/bin/sh
 NO_NEST=1
-source ../bootstrap
+. ../bootstrap
diff --git a/cpp/bootstrap b/cpp/bootstrap
index 6a1e814a..7e61b828 100755
--- a/cpp/bootstrap
+++ b/cpp/bootstrap
@@ -1,3 +1,3 @@
 #!/bin/sh
 NO_NEST=1
-source ../bootstrap
+. ../bootstrap