diff --git a/plugins/papu/gb_apu/Gb_Apu.h b/plugins/papu/gb_apu/Gb_Apu.h
index e41bdc2c2..e2f940b94 100644
--- a/plugins/papu/gb_apu/Gb_Apu.h
+++ b/plugins/papu/gb_apu/Gb_Apu.h
@@ -6,8 +6,8 @@
 #ifndef GB_APU_H
 #define GB_APU_H
 
-typedef int		gb_time_t; // clock cycle count
-typedef int		gb_addr_t; // 16-bit address
+typedef long     gb_time_t; // clock cycle count
+typedef unsigned gb_addr_t; // 16-bit address
 
 #include "Gb_Oscs.h"