diff --git a/ghc-JuicyPixels.spec b/ghc-JuicyPixels.spec
index f39b138..d52e202 100644
--- a/ghc-JuicyPixels.spec
+++ b/ghc-JuicyPixels.spec
@@ -57,6 +57,10 @@ sed -i 's/\r$//' LICENSE
 
 
 %build
+# https://ghc.haskell.org/trac/ghc/ticket/16379
+%ifarch s390x
+cabal_configure_extra_options='--ghc-option="-O0"'
+%endif
 # Begin cabal-rpm build:
 %ghc_lib_build
 # End cabal-rpm build