diff --git a/grudge/symbolic/mappers/__init__.py b/grudge/symbolic/mappers/__init__.py
index dbaae3a7305ae1bfe4fddc00bf02d5719c7d777e..c36f86ab09d8879193b3fa02089e5eb9b58a1885 100644
--- a/grudge/symbolic/mappers/__init__.py
+++ b/grudge/symbolic/mappers/__init__.py
@@ -905,7 +905,7 @@ class _InnerDerivativeJoiner(pymbolic.mapper.RecursiveMapper):
     def map_scalar_parameter(self, expr, *args):
         return DerivativeJoiner()(expr)
 
-    def map_if_positive(self, expr, *args):
+    def map_if(self, expr, *args):
         return DerivativeJoiner()(expr)
 
     def map_power(self, expr, *args):
diff --git a/grudge/symbolic/primitives.py b/grudge/symbolic/primitives.py
index dd20c33b9d6722b4f3e1df766437fd645eea1c88..74b6e7df1d653a305049eb2c31ce786d6b6ac251 100644
--- a/grudge/symbolic/primitives.py
+++ b/grudge/symbolic/primitives.py
@@ -57,6 +57,8 @@ __doc__ = """
 
 .. currentmodule:: grudge.sym
 
+.. autoclass:: If
+
 DOF description
 ^^^^^^^^^^^^^^^