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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 7177d5bb8e..5a6b074f8a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3297,7 +3297,7 @@ AS_IF([test x"${exec_prefix}" != xNONE], [
RUBY_EXEC_PREFIX=$ac_default_prefix
])
pat=`echo "${RUBY_EXEC_PREFIX}" | tr -c '\012' .`'\(.*\)'
-for var in bindir libdir rubylibprefix; do
+for var in bindir includedir libdir rubylibprefix; do
eval val='"$'$var'"'
AS_CASE(["$val"], ["${RUBY_EXEC_PREFIX}"*], [val='${exec_prefix}'"`expr \"$val\" : \"$pat\"`"])
eval $var='"$val"'