diff --git a/omnibus/omnibus.rb b/omnibus/omnibus.rb
index aa19c8d81..3a38bd767 100644
--- a/omnibus/omnibus.rb
+++ b/omnibus/omnibus.rb
@@ -47,3 +47,7 @@ arch = if %w{x86 x64}.include?((ENV["OMNIBUS_WINDOWS_ARCH"] || "").downcase)
          :x86
        end
 windows_arch arch
+
+# Build in FIPS compatability mode
+# ------------------------------
+fips_mode (ENV["OMNIBUS_FIPS_MODE"] || "").casecmp("true") >= 0