diff --git a/ghc/lib/Makefile b/ghc/lib/Makefile
index 8d16853ead4e014d5ce777c9102fb234a9ef601c..0a569cfa36492623b6b49e4e38868bf2f12180fa 100644
--- a/ghc/lib/Makefile
+++ b/ghc/lib/Makefile
@@ -70,7 +70,12 @@ ghc/Unsafe_HC_OPTS           += -Onot
 
 ghc/PrelBase_HC_OPTS         += -H12m
 ghc/PrelRead_HC_OPTS         += -H8m
+ghc/PrelTup_HC_OPTS          += -H8m
+ghc/ArrBase_HC_OPTS          += -H8m
 ghc/IOHandle_HC_OPTS         += -H8m
+required/Time_HC_OPTS        += -H8m
+glaExts/Int_HC_OPTS          += -H8m
+glaExts/Word_HC_OPTS         += -H8m
 
 #-----------------------------------------------------------------------------
 # 	Dependency generation