diff --git a/psycopg/psycopgmodule.c b/psycopg/psycopgmodule.c
index 01069414..af101c3e 100644
--- a/psycopg/psycopgmodule.c
+++ b/psycopg/psycopgmodule.c
@@ -757,11 +757,11 @@ static PyMethodDef psycopgMethods[] = {
     {"QuotedString",  (PyCFunction)psyco_QuotedString,
      METH_VARARGS, psyco_QuotedString_doc},
     {"Boolean",  (PyCFunction)psyco_Boolean,
-     METH_VARARGS, psyco_Float_doc},
-    {"Float",  (PyCFunction)psyco_Float,
-     METH_VARARGS, psyco_Decimal_doc},
-    {"Decimal",  (PyCFunction)psyco_Decimal,
      METH_VARARGS, psyco_Boolean_doc},
+    {"Float",  (PyCFunction)psyco_Float,
+     METH_VARARGS, psyco_Float_doc},
+    {"Decimal",  (PyCFunction)psyco_Decimal,
+     METH_VARARGS, psyco_Decimal_doc},
     {"Binary",  (PyCFunction)psyco_Binary,
      METH_VARARGS, psyco_Binary_doc},
     {"Date",  (PyCFunction)psyco_Date,