diff --git a/jna.spec b/jna.spec
index 11aa363..6588d4e 100644
--- a/jna.spec
+++ b/jna.spec
@@ -1,6 +1,9 @@
+# Allow conditionally building without the reflections library
+%bcond_without reflections
+
 Name:           jna
 Version:        4.5.1
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Pure Java access to native libraries
 # Most of code is dual-licensed under either LGPL 2.1 only or Apache
 # License 2.0.  WeakIdentityHashMap.java was taken from Apache CXF,
@@ -40,7 +43,9 @@ BuildRequires:  ant-junit
 BuildRequires:  junit
 BuildRequires:  libX11-devel
 BuildRequires:  libXt-devel
+%if %{with reflections}
 BuildRequires:  reflections
+%endif
 
 %description
 JNA provides Java programs easy access to native shared libraries
@@ -85,8 +90,15 @@ sed -i 's/\r//' LICENSE
 
 chmod -c 0644 LICENSE OTHERS CHANGES.md
 
+%if %{with reflections}
 sed s,'<include name="junit.jar"/>,&<include name="reflections.jar"/>,' -i build.xml
 build-jar-repository -s -p lib junit reflections ant
+%else
+build-jar-repository -s -p lib junit ant
+rm test/com/sun/jna/StructureFieldOrderInspector.java
+rm test/com/sun/jna/StructureFieldOrderInspectorTest.java
+rm contrib/platform/test/com/sun/jna/platform/StructureFieldOrderTest.java
+%endif
 
 cp lib/native/aix-ppc64.jar lib/clover.jar
 
@@ -129,6 +141,9 @@ install -m 755 build/native*/libjnidispatch*.so %{buildroot}%{_libdir}/%{name}/
 
 
 %changelog
+* Thu Mar 07 2019 Mat Booth <mat.booth@redhat.com> - 4.5.1-6
+- Allow conditionally building without the reflections library for tests
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 4.5.1-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild