diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea3bdaa2..9a956a7b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ All notable changes to this project will be documented in this file.
   will generate warnings when compiled against other versions.
 - Remove Emscripten build. Instead, use the amalgamated source code with a custom toolchain.
 - Update documentation.
+- Add `var-`
 - Add `module/add-paths`
 - Add `file/temp`
 - Add `mod` function to core.
diff --git a/auxbin/jpm b/auxbin/jpm
index 16f8203a..a3efee68 100755
--- a/auxbin/jpm
+++ b/auxbin/jpm
@@ -131,7 +131,6 @@
     ["/nologo" "/MD"]
     ["-std=c99" "-Wall" "-Wextra"]))
 
-
 # Link to pthreads
 (def- thread-flags (if is-win [] (if threads? ["-lpthread"] [])))
 
diff --git a/src/boot/boot.janet b/src/boot/boot.janet
index 4c2a3304..0fe86439 100644
--- a/src/boot/boot.janet
+++ b/src/boot/boot.janet
@@ -58,6 +58,11 @@
   [name & more]
   ~(def ,name :private ,;more))
 
+(defmacro var-
+  "Define a private var that will not be exported."
+  [name & more]
+  ~(var ,name :private ,;more))
+
 (defn defglobal
   "Dynamically create a global def."
   [name value]