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-rw-r--r--utils/exp_semiring.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/utils/exp_semiring.h b/utils/exp_semiring.h
index 7572ccf5..26a22071 100644
--- a/utils/exp_semiring.h
+++ b/utils/exp_semiring.h
@@ -56,7 +56,7 @@ const PRPair<P,R> operator*(const PRPair<P,R>& a, const PRPair<P,R>& b) {
}
template <class P, class R>
-const PRPair<P,R> star(const PRPair<P,R>& x) {
+inline const PRPair<P,R> star(const PRPair<P,R>& x) {
const P pstar = star(x.p);
return PRPair<P,R>(pstar, pstar * x.r * pstar);
}