diff --git a/go.mod b/go.mod
index fb9e494..4564512 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/paulmach/osm
 go 1.13
 
 require (
+	github.com/datadog/czlib v0.0.0-20160811164712-4bc9a24e37f2
 	github.com/gogo/protobuf v1.3.1
 	github.com/paulmach/orb v0.1.6
 	github.com/paulmach/protoscan v0.1.0
diff --git a/go.sum b/go.sum
index eaa8fff..dcc845f 100644
--- a/go.sum
+++ b/go.sum
@@ -2,6 +2,8 @@ cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/datadog/czlib v0.0.0-20160811164712-4bc9a24e37f2 h1:ISaMhBq2dagaoptFGUyywT5SzpysCbHofX3sCNw1djo=
+github.com/datadog/czlib v0.0.0-20160811164712-4bc9a24e37f2/go.mod h1:2yDaWzisHKoQoxm+EU4YgKBaD7g1M0pxy7THWG44Lro=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/gogo/protobuf v1.3.0 h1:G8O7TerXerS4F6sx9OV7/nRfJdnXgHZu/S/7F2SN+UE=
@@ -22,6 +24,7 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
@@ -54,6 +57,7 @@ golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -70,6 +74,7 @@ google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miE
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/osmpbf/decode.go b/osmpbf/decode.go
index a5fd40d..8fb2e59 100644
--- a/osmpbf/decode.go
+++ b/osmpbf/decode.go
@@ -2,7 +2,6 @@ package osmpbf
 
 import (
 	"bytes"
-	"compress/zlib"
 	"context"
 	"encoding/binary"
 	"errors"
@@ -342,7 +341,7 @@ func getData(blob *osmpbf.Blob, data []byte) ([]byte, error) {
 		return blob.GetRaw(), nil
 
 	case blob.ZlibData != nil:
-		r, err := zlib.NewReader(bytes.NewReader(blob.GetZlibData()))
+		r, err := zlibReader(blob.GetZlibData())
 		if err != nil {
 			return nil, err
 		}
diff --git a/osmpbf/zlib_cgo.go b/osmpbf/zlib_cgo.go
new file mode 100644
index 0000000..fbcf3f6
--- /dev/null
+++ b/osmpbf/zlib_cgo.go
@@ -0,0 +1,14 @@
+// +build cgo
+
+package osmpbf
+
+import (
+	"bytes"
+	"io"
+
+	"github.com/datadog/czlib"
+)
+
+func zlibReader(data []byte) (io.ReadCloser, error) {
+	return czlib.NewReader(bytes.NewReader(data))
+}
diff --git a/osmpbf/zlib_go.go b/osmpbf/zlib_go.go
new file mode 100644
index 0000000..ddae9b8
--- /dev/null
+++ b/osmpbf/zlib_go.go
@@ -0,0 +1,13 @@
+// +build !cgo
+
+package osmpbf
+
+import (
+	"bytes"
+	"compress/zlib"
+	"io"
+)
+
+func zlibReader(data []byte) (io.ReadCloser, error) {
+	return zlib.NewReader(bytes.NewReader(data))
+}