diff --git a/AERN-Real.cabal b/AERN-Real.cabal
--- a/AERN-Real.cabal
+++ b/AERN-Real.cabal
@@ -1,5 +1,5 @@
 Name:           AERN-Real
-Version:        0.9.1
+Version:        0.9.2
 Cabal-Version:  >= 1.2
 Build-Type:     Simple
 License:        BSD3
@@ -52,10 +52,10 @@
   hs-source-dirs:  src
   if flag(containers-in-base)
     Build-Depends:
-      base < 3, binary >= 0.4
+      base < 3, binary >= 0.4, haskell98
   else
     Build-Depends:
-      base >= 3, containers, binary >= 0.4
+      base >= 3, containers, binary >= 0.4, haskell98
   Exposed-modules:
     Data.Number.ER,
     Data.Number.ER.Real,