diff --git a/include/mgba-util/common.h b/include/mgba-util/common.h
index 00193f6ff..49f32fa88 100644
--- a/include/mgba-util/common.h
+++ b/include/mgba-util/common.h
@@ -129,31 +129,32 @@ typedef intptr_t ssize_t;
 #define LOAD_32BE(DEST, ADDR, ARR) DEST = *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
 #if defined(__PPC__) || defined(__POWERPC__)
 #define LOAD_32LE(DEST, ADDR, ARR) { \
-	uint32_t _addr = (ADDR); \
+	off_t _addr = (ADDR); \
 	const void* _ptr = (ARR); \
 	__asm__("lwbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
 }
 
 #define LOAD_16LE(DEST, ADDR, ARR) { \
-	uint32_t _addr = (ADDR); \
+	off_t _addr = (ADDR); \
 	const void* _ptr = (ARR); \
 	__asm__("lhbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
 }
 
 #define STORE_32LE(SRC, ADDR, ARR) { \
-	uint32_t _addr = (ADDR); \
+	off_t _addr = (ADDR); \
 	void* _ptr = (ARR); \
 	__asm__("stwbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr) : "memory"); \
 }
 
 #define STORE_16LE(SRC, ADDR, ARR) { \
-	uint32_t _addr = (ADDR); \
+	off_t _addr = (ADDR); \
 	void* _ptr = (ARR); \
 	__asm__("sthbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr) : "memory"); \
 }
 
+#ifndef _ARCH_PWR7
 #define LOAD_64LE(DEST, ADDR, ARR) { \
-	uint32_t _addr = (ADDR); \
+	off_t _addr = (ADDR); \
 	union { \
 		struct { \
 			uint32_t hi; \
@@ -170,7 +171,7 @@ typedef intptr_t ssize_t;
 }
 
 #define STORE_64LE(SRC, ADDR, ARR) { \
-	uint32_t _addr = (ADDR); \
+	off_t _addr = (ADDR); \
 	union { \
 		struct { \
 			uint32_t hi; \
@@ -184,6 +185,19 @@ typedef intptr_t ssize_t;
 		"stwbrx %1, %2, %4 \n" \
 		: : "r"(bswap.hi), "r"(bswap.lo), "b"(_ptr), "r"(_addr), "r"(_addr + 4) : "memory"); \
 }
+#else
+#define LOAD_64LE(DEST, ADDR, ARR) { \
+	off_t _addr = (ADDR); \
+	const void* _ptr = (ARR); \
+	__asm__("ldbrx %0, %1, %2" : "=r"(DEST) : "b"(_ptr), "r"(_addr)); \
+}
+
+#define STORE_64LE(SRC, ADDR, ARR) { \
+	off_t _addr = (ADDR); \
+	void* _ptr = (ARR); \
+	__asm__("stdbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr) : "memory"); \
+}
+#endif
 
 #elif defined(__llvm__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
 #define LOAD_64LE(DEST, ADDR, ARR) DEST = __builtin_bswap64(((uint64_t*) ARR)[(ADDR) >> 3])