diff --git a/src/mame/drivers/r9751.cpp b/src/mame/drivers/r9751.cpp
index 6b1a172e41a..d365924a557 100644
--- a/src/mame/drivers/r9751.cpp
+++ b/src/mame/drivers/r9751.cpp
@@ -79,8 +79,8 @@
 #define TRACE_SMIOC_READ(address, data, reg, text) UnifiedTrace((address),(data)," Read", "SMIOC", (reg), (text))
 #define TRACE_SMIOC_WRITE(address, data, reg, text) UnifiedTrace((address),(data),"Write", "SMIOC", (reg), (text))
 #else
-#define TRACE_SMIOC_READ(address, data, reg, text)
-#define TRACE_SMIOC_WRITE(address, data, reg, text)
+#define TRACE_SMIOC_READ(address, data, reg, text) do {} while (0)
+#define TRACE_SMIOC_WRITE(address, data, reg, text) do {} while (0)
 #endif
 
 class r9751_state : public driver_device
diff --git a/src/mame/includes/x1.h b/src/mame/includes/x1.h
index 136ba41117c..9b7a79d9cb9 100644
--- a/src/mame/includes/x1.h
+++ b/src/mame/includes/x1.h
@@ -159,7 +159,7 @@ public:
 	uint8_t m_key_irq_flag;       /**< Keyboard IRQ pending. */
 	uint8_t m_key_irq_vector;     /**< Keyboard IRQ vector. */
 
-private:
+protected:
 	struct scrn_reg_t
 	{
 		uint8_t gfx_bank;