diff --git a/src/include/lib/radixtree.h b/src/include/lib/radixtree.h
index 338e1d741d..267ec6de03 100644
--- a/src/include/lib/radixtree.h
+++ b/src/include/lib/radixtree.h
@@ -1015,12 +1015,15 @@ RT_NODE_16_SEARCH_EQ(RT_NODE_16 * node, uint8 chunk)
 	/* convert comparison to a bitfield */
 	bitfield = vector8_highbit_mask(cmp1) | (vector8_highbit_mask(cmp2) << sizeof(Vector8));
 
-	/* mask off invalid entries */
-	bitfield &= ((UINT64CONST(1) << count) - 1);
-
-	/* convert bitfield to index by counting trailing zeros */
 	if (bitfield)
-		slot_simd = &node->children[pg_rightmost_one_pos32(bitfield)];
+	{
+		/* mask off invalid entries */
+		bitfield &= ((UINT64CONST(1) << count) - 1);
+
+		/* convert bitfield to index by counting trailing zeros */
+		if (bitfield)
+			slot_simd = &node->children[pg_rightmost_one_pos32(bitfield)];
+	}
 
 	Assert(slot_simd == slot);
 	return slot_simd;