diff --git a/base/gxblend.c b/base/gxblend.c

index 7c3d55b..55215d6 100644

--- a/base/gxblend.c

+++ b/base/gxblend.c

@@ -2174,7 +2174,7 @@ pdf14_compose_group(pdf14_buf *tos, pdf14_buf *nos, pdf14_buf *maskbuf,

              overprint == 0) {

              /* Additive vs Subtractive makes no difference in normal blend mode with no spots */

         if (tos_isolated) {

-            if (has_mask || maskbuf) {/* 7% */

+            if (has_mask && maskbuf) {/* 7% */

                 /* AirPrint test case hits this */

                 if (maskbuf && maskbuf->rect.p.x <= x0 && maskbuf->rect.p.y <= y0 &&

                     maskbuf->rect.q.x >= x1 && maskbuf->rect.q.y >= y1)