diff --git a/src/backend/executor/execPartition.c b/src/backend/executor/execPartition.c
index eb8a87fd632..f6c34328b85 100644
--- a/src/backend/executor/execPartition.c
+++ b/src/backend/executor/execPartition.c
@@ -2108,7 +2108,7 @@ InitPartitionPruneContext(PartitionPruneContext *context,
 	foreach(lc, pruning_steps)
 	{
 		PartitionPruneStepOp *step = (PartitionPruneStepOp *) lfirst(lc);
-		ListCell   *lc2;
+		ListCell   *lc2 = list_head(step->exprs);
 		int			keyno;
 
 		/* not needed for other step kinds */
@@ -2117,34 +2117,39 @@ InitPartitionPruneContext(PartitionPruneContext *context,
 
 		Assert(list_length(step->exprs) <= partnatts);
 
-		keyno = 0;
-		foreach(lc2, step->exprs)
+		for (keyno = 0; keyno < partnatts; keyno++)
 		{
-			Expr	   *expr = (Expr *) lfirst(lc2);
+			if (bms_is_member(keyno, step->nullkeys))
+				continue;
 
-			/* not needed for Consts */
-			if (!IsA(expr, Const))
+			if (lc2 != NULL)
 			{
-				int			stateidx = PruneCxtStateIdx(partnatts,
-														step->step.step_id,
-														keyno);
+				Expr	   *expr = lfirst(lc2);
 
-				/*
-				 * When planstate is NULL, pruning_steps is known not to
-				 * contain any expressions that depend on the parent plan.
-				 * Information of any available EXTERN parameters must be
-				 * passed explicitly in that case, which the caller must have
-				 * made available via econtext.
-				 */
-				if (planstate == NULL)
-					context->exprstates[stateidx] =
-						ExecInitExprWithParams(expr,
-											   econtext->ecxt_param_list_info);
-				else
-					context->exprstates[stateidx] =
-						ExecInitExpr(expr, context->planstate);
+				/* not needed for Consts */
+				if (!IsA(expr, Const))
+				{
+					int			stateidx = PruneCxtStateIdx(partnatts,
+															step->step.step_id,
+															keyno);
+
+					/*
+					 * When planstate is NULL, pruning_steps is known not to
+					 * contain any expressions that depend on the parent plan.
+					 * Information of any available EXTERN parameters must be
+					 * passed explicitly in that case, which the caller must
+					 * have made available via econtext.
+					 */
+					if (planstate == NULL)
+						context->exprstates[stateidx] =
+							ExecInitExprWithParams(expr,
+												   econtext->ecxt_param_list_info);
+					else
+						context->exprstates[stateidx] =
+							ExecInitExpr(expr, context->planstate);
+				}
+				lc2 = lnext(step->exprs, lc2);
 			}
-			keyno++;
 		}
 	}
 }
diff --git a/src/test/regress/expected/partition_prune.out b/src/test/regress/expected/partition_prune.out
index c453c3def24..9a4c48c0556 100644
--- a/src/test/regress/expected/partition_prune.out
+++ b/src/test/regress/expected/partition_prune.out
@@ -1948,7 +1948,6 @@ explain (costs off) select * from hp where a = 1 and b = 'abcde' and
    One-Time Filter: false
 (2 rows)
 
-drop table hp;
 --
 -- Test runtime partition pruning
 --
@@ -2070,6 +2069,27 @@ explain (analyze, costs off, summary off, timing off) execute ab_q3 (2, 2);
          Filter: ((b >= $1) AND (b <= $2) AND (a < $0))
 (10 rows)
 
+--
+-- Test runtime pruning with hash partitioned tables
+--
+-- recreate partitions dropped above
+create table hp1 partition of hp for values with (modulus 4, remainder 1);
+create table hp2 partition of hp for values with (modulus 4, remainder 2);
+create table hp3 partition of hp for values with (modulus 4, remainder 3);
+-- Ensure we correctly prune unneeded partitions when there is an IS NULL qual
+prepare hp_q1 (text) as
+select * from hp where a is null and b = $1;
+explain (costs off) execute hp_q1('xxx');
+                 QUERY PLAN                 
+--------------------------------------------
+ Append
+   Subplans Removed: 3
+   ->  Seq Scan on hp2 hp_1
+         Filter: ((a IS NULL) AND (b = $1))
+(4 rows)
+
+deallocate hp_q1;
+drop table hp;
 -- Test a backwards Append scan
 create table list_part (a int) partition by list (a);
 create table list_part1 partition of list_part for values in (1);
diff --git a/src/test/regress/sql/partition_prune.sql b/src/test/regress/sql/partition_prune.sql
index 9092e61e7ec..7bf3920827f 100644
--- a/src/test/regress/sql/partition_prune.sql
+++ b/src/test/regress/sql/partition_prune.sql
@@ -384,8 +384,6 @@ drop table hp2;
 explain (costs off) select * from hp where a = 1 and b = 'abcde' and
   (c = 2 or c = 3);
 
-drop table hp;
-
 --
 -- Test runtime partition pruning
 --
@@ -436,6 +434,25 @@ select a from ab where b between $1 and $2 and a < (select 3);
 
 explain (analyze, costs off, summary off, timing off) execute ab_q3 (2, 2);
 
+--
+-- Test runtime pruning with hash partitioned tables
+--
+
+-- recreate partitions dropped above
+create table hp1 partition of hp for values with (modulus 4, remainder 1);
+create table hp2 partition of hp for values with (modulus 4, remainder 2);
+create table hp3 partition of hp for values with (modulus 4, remainder 3);
+
+-- Ensure we correctly prune unneeded partitions when there is an IS NULL qual
+prepare hp_q1 (text) as
+select * from hp where a is null and b = $1;
+
+explain (costs off) execute hp_q1('xxx');
+
+deallocate hp_q1;
+
+drop table hp;
+
 -- Test a backwards Append scan
 create table list_part (a int) partition by list (a);
 create table list_part1 partition of list_part for values in (1);