diff --git a/dwarves.c b/dwarves.c
index fd21845..111797b 100644
--- a/dwarves.c
+++ b/dwarves.c
@@ -168,8 +168,8 @@ static struct base_type_name_to_size {
 	{ .name = "double double",	    .size = 64, },
 	{ .name = "single float",	    .size = 32, },
 	{ .name = "float",		    .size = 32, },
-	{ .name = "long double",	    .size = 64, },
-	{ .name = "long double long double", .size = 64, },
+	{ .name = "long double",	    .size = sizeof(long double) * 8, },
+	{ .name = "long double long double", .size = sizeof(long double) * 8, },
 	{ .name = "__int128",		    .size = 128, },
 	{ .name = "unsigned __int128",	    .size = 128, },
 	{ .name = "__int128 unsigned",	    .size = 128, },