diff --git a/mbedtls.spec b/mbedtls.spec
index 88791e7..1065557 100644
--- a/mbedtls.spec
+++ b/mbedtls.spec
@@ -4,7 +4,7 @@
 
 Name: mbedtls
 Version: 2.16.0
-Release: 2%{?dist}
+Release: 3%{?dist}
 Summary: Light-weight cryptographic and SSL/TLS library
 License: ASL 2.0
 URL: https://tls.mbed.org/
@@ -44,6 +44,7 @@ Cryptographic utilities based on %{name}.
 %package        devel
 Summary:        Development files for %{name}
 Requires:       %{name}%{?_isa} = %{version}-%{release}
+Requires:       zlib-devel
 Obsoletes:      polarssl-devel < 1.3.10
 Provides:       polarssl-devel = %{version}-%{release}
 
@@ -119,6 +120,9 @@ LD_LIBRARY_PATH=$PWD/library ctest --output-on-failure -V
 %doc apidoc/*
 
 %changelog
+* Mon Feb 11 2019 Peter Robinson <pbrobinson@fedoraproject.org> 2.16.0-3
+- devel package needs zlib-devel
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.16.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild