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-rw-r--r--compiler/GHC/Core/SimpleOpt.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Core/SimpleOpt.hs b/compiler/GHC/Core/SimpleOpt.hs
index 47d2c3f454..40e9f138b7 100644
--- a/compiler/GHC/Core/SimpleOpt.hs
+++ b/compiler/GHC/Core/SimpleOpt.hs
@@ -665,7 +665,7 @@ add_info env old_bndr top_level new_rhs new_bndr
`setUnfoldingInfo` new_unfolding
old_rules = ruleInfo old_info
- new_rules = substSpec subst new_bndr old_rules
+ new_rules = substRuleInfo subst new_bndr old_rules
old_unfolding = realUnfoldingInfo old_info
new_unfolding | isStableUnfolding old_unfolding