diff --git a/ghc/lib/std/Makefile b/ghc/lib/std/Makefile
index cdf7963ec6b0f167f450785cca3b9e877258c7e5..542d536ef09fae483b79e1d3e6cb9abfa9cf23b4 100644
--- a/ghc/lib/std/Makefile
+++ b/ghc/lib/std/Makefile
@@ -29,7 +29,7 @@ ifneq "$(way)" "dll"
 PACKAGE = -package-name std
 else
 # Hack by SPJ to delay if-then-else until the pattern rule when we have $*
-PACKAGE = $(subst ~, ,$(word $(words dummy $(findstr $(notdir $*), PrelMain )), -package-name~std))
+PACKAGE = $(subst ~, ,$(word $(words dummy $(findstring $(notdir $*), PrelMain )), -package-name~std))
 endif
 LIBRARY = libHSstd$(_way).a