diff --git a/pymbolic/interop/maxima.py b/pymbolic/interop/maxima.py
index 93a7299a96540cc9e0a2924f2a9e06e2cd72a82f..af4e54e3536d941334fd5283f44ffc9732ac6ee3 100644
--- a/pymbolic/interop/maxima.py
+++ b/pymbolic/interop/maxima.py
@@ -246,7 +246,7 @@ def _strify_assignments_and_expr(assignments, expr):
             return assignment
         if isinstance(assignment, tuple):
             name, value = assignment
-            return"{}: {}".format(name, strify(value))
+            return "{}: {}".format(name, strify(value))
         else:
             return strify(assignment)