diff --git a/arch/m32r/boot/compressed/misc.c b/arch/m32r/boot/compressed/misc.c
index 370d60881977..3147aa248b93 100644
--- a/arch/m32r/boot/compressed/misc.c
+++ b/arch/m32r/boot/compressed/misc.c
@@ -39,6 +39,16 @@ static void *memset(void *s, int c, size_t n)
 #endif
 
 #ifdef CONFIG_KERNEL_GZIP
+void *memcpy(void *dest, const void *src, size_t n)
+{
+	char *d = dest;
+	const char *s = src;
+	while (n--)
+		*d++ = *s++;
+
+	return dest;
+}
+
 #define BOOT_HEAP_SIZE             0x10000
 #include "../../../../lib/decompress_inflate.c"
 #endif