diff --git a/mono-core.spec b/mono-core.spec
index 4164792..da78ad8 100644
--- a/mono-core.spec
+++ b/mono-core.spec
@@ -284,6 +284,7 @@ rm -rf %{buildroot}
 %{_prefix}/lib/mono/4.0/System.Core.dll
 %{_prefix}/lib/mono/4.0/System.Drawing.dll
 %{_prefix}/lib/mono/4.0/System.Dynamic.dll
+%{_prefix}/lib/mono/4.0/System.Json.dll
 %{_prefix}/lib/mono/4.0/System.Json.Microsoft.dll
 %{_prefix}/lib/mono/4.0/System.Net.dll
 %{_prefix}/lib/mono/4.0/System.Numerics.dll
@@ -325,6 +326,7 @@ rm -rf %{buildroot}
 %{_prefix}/lib/mono/4.5/System.Core.dll
 %{_prefix}/lib/mono/4.5/System.Drawing.dll
 %{_prefix}/lib/mono/4.5/System.Dynamic.dll
+%{_prefix}/lib/mono/4.5/System.Json.dll
 %{_prefix}/lib/mono/4.5/System.Json.Microsoft.dll
 %{_prefix}/lib/mono/4.5/System.Net.dll
 %{_prefix}/lib/mono/4.5/System.Net.Http.dll