diff --git a/src/ports/greenplum/4.0/config/Modules.yml b/src/ports/greenplum/4.0/config/Modules.yml
index 63841d5..d72e1c8 100644
--- a/src/ports/greenplum/4.0/config/Modules.yml
+++ b/src/ports/greenplum/4.0/config/Modules.yml
@@ -25,6 +25,8 @@
       depends: ['utilities']
     - name: sample
       depends: ['utilities']
+    - name: convex
+      depends: ['utilities']
     - name: sketch
     - name: stats
     - name: svd_mf
diff --git a/src/ports/postgres/modules/convex/lmf.sql_in b/src/ports/postgres/modules/convex/lmf.sql_in
index b999bd2..44a66d0 100644
--- a/src/ports/postgres/modules/convex/lmf.sql_in
+++ b/src/ports/postgres/modules/convex/lmf.sql_in
@@ -191,7 +191,7 @@
         /*+ scale_factor */     DOUBLE PRECISION) (
     STYPE=DOUBLE PRECISION[],
     SFUNC=MADLIB_SCHEMA.lmf_igd_transition,
-    m4_ifdef(`__GREENPLUM__',`prefunc=MADLIB_SCHEMA.lmf_igd_merge,')
+    -- m4_ifdef(`__GREENPLUM__',`PREFUNC=MADLIB_SCHEMA.lmf_igd_merge,')
     FINALFUNC=MADLIB_SCHEMA.lmf_igd_final,
     INITCOND='{0,0,0,0,0,0,0,0,0}'
 );