diff --git a/pkgs/development/python-modules/matplotlib-inline/default.nix b/pkgs/development/python-modules/matplotlib-inline/default.nix
index d863239430dc..9ee23b87ee81 100644
--- a/pkgs/development/python-modules/matplotlib-inline/default.nix
+++ b/pkgs/development/python-modules/matplotlib-inline/default.nix
@@ -1,4 +1,5 @@
 { lib, buildPythonPackage, fetchPypi
+, matplotlib
 , traitlets
 
 # tests
@@ -15,6 +16,7 @@ buildPythonPackage rec {
   };
 
   propagatedBuildInputs = [
+    matplotlib # not documented, but required
     traitlets
   ];