diff --git a/sys/arm64/arm64/db_interface.c b/sys/arm64/arm64/db_interface.c
--- a/sys/arm64/arm64/db_interface.c
+++ b/sys/arm64/arm64/db_interface.c
@@ -125,7 +125,7 @@
 	if (ret == 0) {
 		src = (const char *)addr;
 		if (size == 8 && (addr & 7) == 0) {
-			tmp64 = *((const int *)src);
+			tmp64 = *((const long *)src);
 			src = (const char *)&tmp64;
 		} else if (size == 4 && (addr & 3) == 0) {
 			tmp32 = *((const int *)src);