diff --git a/src/devices/cpu/m6809/m6809.h b/src/devices/cpu/m6809/m6809.h
index 0af03cfd47b..50ceef45615 100644
--- a/src/devices/cpu/m6809/m6809.h
+++ b/src/devices/cpu/m6809/m6809.h
@@ -34,8 +34,8 @@ protected:
 
 	class memory_interface {
 	public:
-		memory_access<16, 0, 0, ENDIANNESS_LITTLE>::cache cprogram, csprogram;
-		memory_access<16, 0, 0, ENDIANNESS_LITTLE>::specific program;
+		memory_access<16, 0, 0, ENDIANNESS_BIG>::cache cprogram, csprogram;
+		memory_access<16, 0, 0, ENDIANNESS_BIG>::specific program;
 
 		virtual ~memory_interface() {}
 		virtual uint8_t read(uint16_t adr) = 0;