diff --git a/btf_loader.c b/btf_loader.c
index ec286f413f36..a39edd3362db 100644
--- a/btf_loader.c
+++ b/btf_loader.c
@@ -107,6 +107,7 @@ static struct base_type *base_type__new(strings_t name, uint32_t attrs,
 		bt->bit_size = size;
 		bt->is_signed = attrs & BTF_INT_SIGNED;
 		bt->is_bool = attrs & BTF_INT_BOOL;
+		bt->is_unsigned = attrs & BTF_INT_UNSIGNED;
 		bt->name_has_encoding = false;
 		bt->float_type = float_type;
 	}
diff --git a/ctf.h b/ctf.h
index 25b79892bde3..9e47c3c74677 100644
--- a/ctf.h
+++ b/ctf.h
@@ -100,6 +100,7 @@ struct ctf_full_type {
 #define CTF_TYPE_INT_CHAR	0x2
 #define CTF_TYPE_INT_BOOL	0x4
 #define CTF_TYPE_INT_VARARGS	0x8
+#define CTF_TYPE_INT_UNSIGNED	0x16
 
 #define CTF_TYPE_FP_ATTRS(VAL)		((VAL) >> 24)
 #define CTF_TYPE_FP_OFFSET(VAL)		(((VAL) >> 16) & 0xff)
diff --git a/dwarf_loader.c b/dwarf_loader.c
index b73d7867e1e6..79d40f183c24 100644
--- a/dwarf_loader.c
+++ b/dwarf_loader.c
@@ -473,6 +473,7 @@ static struct base_type *base_type__new(Dwarf_Die *die, struct cu *cu)
 		bt->is_bool = encoding == DW_ATE_boolean;
 		bt->is_signed = encoding == DW_ATE_signed;
 		bt->is_varargs = false;
+		bt->is_unsigned = encoding == DW_ATE_unsigned;
 		bt->name_has_encoding = true;
 	}
 
diff --git a/dwarves.h b/dwarves.h
index 98caf1abc54d..edf32d2e6f80 100644
--- a/dwarves.h
+++ b/dwarves.h
@@ -1261,6 +1261,7 @@ struct base_type {
 	uint8_t		is_signed:1;
 	uint8_t		is_bool:1;
 	uint8_t		is_varargs:1;
+	uint8_t		is_unsigned:1;
 	uint8_t		float_type:4;
 };
 
diff --git a/lib/bpf b/lib/bpf
--- a/lib/bpf
+++ b/lib/bpf
@@ -1 +1 @@
-Subproject commit 5af3d86b5a2c5fecdc3ab83822d083edd32b4396
+Subproject commit 5af3d86b5a2c5fecdc3ab83822d083edd32b4396-dirty
diff --git a/libbtf.c b/libbtf.c
index 9f7628304495..f47de1ecd21e 100644
--- a/libbtf.c
+++ b/libbtf.c
@@ -247,6 +247,8 @@ static const char * btf_elf__int_encoding_str(uint8_t encoding)
 		return "CHAR";
 	else if (encoding == BTF_INT_BOOL)
 		return "BOOL";
+	else if (encoding == BTF_INT_UNSIGNED)
+		return "UNSIGNED";
 	else
 		return "UNKN";
 }
@@ -379,6 +381,8 @@ int32_t btf_elf__add_base_type(struct btf_elf *btfe, const struct base_type *bt,
 		encoding = BTF_INT_SIGNED;
 	} else if (bt->is_bool) {
 		encoding = BTF_INT_BOOL;
+	} else if (bt->is_unsigned) {
+		; /* ignored for now */
 	} else if (bt->float_type) {
 		fprintf(stderr, "float_type is not supported\n");
 		return -1;