diff --git a/src/mame/video/boogwing.cpp b/src/mame/video/boogwing.cpp
index ce885ae8fb5..924fb0be30c 100644
--- a/src/mame/video/boogwing.cpp
+++ b/src/mame/video/boogwing.cpp
@@ -28,8 +28,7 @@ void boogwing_state::mix_boogwing(screen_device &screen, bitmap_rgb32 &bitmap, c
 	bitmap_ind16 *sprite_bitmap1, *sprite_bitmap2;
 	bitmap_ind8* priority_bitmap;
 
-	address_space &space = machine().dummy_space();
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 	sprite_bitmap1 = &m_sprgen1->get_sprite_temp_bitmap();
 	sprite_bitmap2 = &m_sprgen2->get_sprite_temp_bitmap();
@@ -182,7 +181,7 @@ uint32_t boogwing_state::screen_update_boogwing(screen_device &screen, bitmap_rg
 {
 	address_space &space = machine().dummy_space();
 	uint16_t flip = m_deco_tilegen1->pf_control_r(space, 0, 0xffff);
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 	/* Draw sprite planes to bitmaps for later mixing */
 	m_sprgen2->draw_sprites(bitmap, cliprect, m_spriteram2->buffer(), 0x400, true);
diff --git a/src/mame/video/cninja.cpp b/src/mame/video/cninja.cpp
index 3116f59711f..c19c5b24d63 100644
--- a/src/mame/video/cninja.cpp
+++ b/src/mame/video/cninja.cpp
@@ -201,7 +201,7 @@ uint32_t cninja_state::screen_update_robocop2(screen_device &screen, bitmap_ind1
 {
 	address_space &space = machine().dummy_space();
 	uint16_t flip = m_deco_tilegen1->pf_control_r(space, 0, 0xffff);
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 	/* One of the tilemap chips can switch between 2 tilemaps at 4bpp, or 1 at 8bpp */
 	if (priority & 4)
@@ -258,7 +258,7 @@ uint32_t cninja_state::screen_update_mutantf(screen_device &screen, bitmap_rgb32
 {
 	address_space &space = machine().dummy_space();
 	uint16_t flip = m_deco_tilegen1->pf_control_r(space, 0, 0xffff);
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 
 	flip_screen_set(BIT(flip, 7));
diff --git a/src/mame/video/dassault.cpp b/src/mame/video/dassault.cpp
index c09ff6381f3..79be65a70ed 100644
--- a/src/mame/video/dassault.cpp
+++ b/src/mame/video/dassault.cpp
@@ -78,7 +78,7 @@ uint32_t dassault_state::screen_update_dassault(screen_device &screen, bitmap_rg
 {
 	address_space &space = machine().dummy_space();
 	uint16_t flip = m_deco_tilegen1->pf_control_r(space, 0, 0xffff);
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 	m_sprgen2->draw_sprites(bitmap, cliprect, m_spriteram2->buffer(), 0x400, false);
 	m_sprgen1->draw_sprites(bitmap, cliprect, m_spriteram->buffer(), 0x400, false);
diff --git a/src/mame/video/decocomn.cpp b/src/mame/video/decocomn.cpp
index 61a5226b21d..3087d9130f7 100644
--- a/src/mame/video/decocomn.cpp
+++ b/src/mame/video/decocomn.cpp
@@ -119,7 +119,7 @@ WRITE16_MEMBER( decocomn_device::priority_w )
 	m_priority = data;
 }
 
-READ16_MEMBER( decocomn_device::priority_r )
+uint16_t decocomn_device::priority_r()
 {
 	return m_priority;
 }
diff --git a/src/mame/video/decocomn.h b/src/mame/video/decocomn.h
index 80879d3810d..5423ea160ad 100644
--- a/src/mame/video/decocomn.h
+++ b/src/mame/video/decocomn.h
@@ -29,7 +29,7 @@ public:
 	DECLARE_WRITE16_MEMBER( buffered_palette_w );
 	DECLARE_WRITE16_MEMBER( palette_dma_w );
 	DECLARE_WRITE16_MEMBER( priority_w );
-	DECLARE_READ16_MEMBER( priority_r );
+	uint16_t priority_r();
 	DECLARE_READ16_MEMBER( d_71_r );
 
 protected:
diff --git a/src/mame/video/rohga.cpp b/src/mame/video/rohga.cpp
index 0a387565c30..6bf0442bc33 100644
--- a/src/mame/video/rohga.cpp
+++ b/src/mame/video/rohga.cpp
@@ -24,7 +24,7 @@ uint32_t rohga_state::screen_update_rohga(screen_device &screen, bitmap_ind16 &b
 {
 	address_space &space = machine().dummy_space();
 	uint16_t flip = m_deco_tilegen1->pf_control_r(space, 0, 0xffff);
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 	/* Update playfields */
 	flip_screen_set(BIT(flip, 7));
@@ -127,7 +127,7 @@ uint32_t rohga_state::screen_update_wizdfire(screen_device &screen, bitmap_rgb32
 {
 	address_space &space = machine().dummy_space();
 	uint16_t flip = m_deco_tilegen1->pf_control_r(space, 0, 0xffff);
-	uint16_t priority = m_decocomn->priority_r(space, 0, 0xffff);
+	uint16_t priority = m_decocomn->priority_r();
 
 	/* draw sprite gfx to temp bitmaps */
 	m_sprgen2->draw_sprites(bitmap, cliprect, m_spriteram2->buffer(), 0x400, true);