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-rw-r--r--src/mame/video/rltennis.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/video/rltennis.cpp b/src/mame/video/rltennis.cpp
index 0a3ada8a550..542de9cf183 100644
--- a/src/mame/video/rltennis.cpp
+++ b/src/mame/video/rltennis.cpp
@@ -208,7 +208,7 @@ WRITE16_MEMBER(rltennis_state::blitter_w)
int address=yy*512+xx;
- int pix = m_gfx[ address & 0x0ffffff ];
+ int pix = m_gfx[ address & m_gfx.mask() ];
int screen_x=(x&0xff)+((m_blitter[BLT_FLAGS] & BLTFLAG_DST_LR )?256:0);
if((pix || force_blit)&& screen_x >0 && y >0 && screen_x < 512 && y < 256 )