diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c236588c23a5..c2074578d3f4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-01-07  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* tree-vect-stmts.c (vectorizable_store): Don't use the dataref_offset
+	optimization for masked stores.
+
 2019-01-07  Richard Sandiford  <richard.sandiford@arm.com>
 
 	PR middle-end/88567
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 45550927069a..c0e19dd178c4 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -7059,6 +7059,7 @@ vectorizable_store (stmt_vec_info stmt_info, gimple_stmt_iterator *gsi,
 	  bool simd_lane_access_p
 	    = STMT_VINFO_SIMD_LANE_ACCESS_P (stmt_info);
 	  if (simd_lane_access_p
+	      && !loop_masks
 	      && TREE_CODE (DR_BASE_ADDRESS (first_dr_info->dr)) == ADDR_EXPR
 	      && VAR_P (TREE_OPERAND (DR_BASE_ADDRESS (first_dr_info->dr), 0))
 	      && integer_zerop (DR_OFFSET (first_dr_info->dr))