diff --git a/pkg/Kconfig b/pkg/Kconfig
index 50a70066d5..99234e4217 100644
--- a/pkg/Kconfig
+++ b/pkg/Kconfig
@@ -53,6 +53,7 @@ rsource "umorse/Kconfig"
 rsource "utensor/Kconfig"
 rsource "uwb-core/Kconfig"
 rsource "uwb-dw1000/Kconfig"
+rsource "uzlib/Kconfig"
 rsource "wakaama/Kconfig"
 rsource "yxml/Kconfig"
 
diff --git a/pkg/uzlib/Kconfig b/pkg/uzlib/Kconfig
new file mode 100644
index 0000000000..5919182e37
--- /dev/null
+++ b/pkg/uzlib/Kconfig
@@ -0,0 +1,9 @@
+# Copyright (c) 2021 Inria
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+config PACKAGE_UZLIB
+    bool "uzlib - Deflate/Zlib-compatible LZ77 compression/decompression library"
+    depends on TEST_KCONFIG
diff --git a/pkg/uzlib/Makefile b/pkg/uzlib/Makefile
new file mode 100644
index 0000000000..48dc3d7276
--- /dev/null
+++ b/pkg/uzlib/Makefile
@@ -0,0 +1,11 @@
+PKG_NAME=uzlib
+PKG_URL=https://github.com/pfalcon/uzlib
+PKG_VERSION=27e4f4c15ba30c2cfc89575159e8efb50f95037e  # v2.9.5
+PKG_LICENSE=zlib
+
+include $(RIOTBASE)/pkg/pkg.mk
+
+CFLAGS += -Wno-sign-compare
+
+all:
+	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/src -f $(CURDIR)/$(PKG_NAME).mk
diff --git a/pkg/uzlib/Makefile.dep b/pkg/uzlib/Makefile.dep
new file mode 100644
index 0000000000..4fc0b10519
--- /dev/null
+++ b/pkg/uzlib/Makefile.dep
@@ -0,0 +1,2 @@
+# uzlib contains code incompatible with 8bit and 16bit architectures
+FEATURES_BLACKLIST += arch_8bit arch_16bit
diff --git a/pkg/uzlib/Makefile.include b/pkg/uzlib/Makefile.include
new file mode 100644
index 0000000000..2573f5e561
--- /dev/null
+++ b/pkg/uzlib/Makefile.include
@@ -0,0 +1 @@
+INCLUDES += -I$(PKGDIRBASE)/uzlib/src
diff --git a/pkg/uzlib/doc.txt b/pkg/uzlib/doc.txt
new file mode 100644
index 0000000000..5a33e034a6
--- /dev/null
+++ b/pkg/uzlib/doc.txt
@@ -0,0 +1,11 @@
+/**
+ * @defgroup pkg_uzlib   uzlib
+ * @ingroup  pkg
+ * @brief    Deflate/Zlib-compatible LZ77 compression/decompression library
+ *
+ * # License
+ *
+ * Licensed under zlib.
+ *
+ * @see      https://github.com/pfalcon/uzlib
+ */
diff --git a/pkg/uzlib/uzlib.mk b/pkg/uzlib/uzlib.mk
new file mode 100644
index 0000000000..7925b4581c
--- /dev/null
+++ b/pkg/uzlib/uzlib.mk
@@ -0,0 +1,3 @@
+MODULE = uzlib
+
+include $(RIOTBASE)/Makefile.base