1 files changed, 2 insertions, 0 deletions

diff --git a/lib/Data/Packed/Internal/aux.h b/lib/Data/Packed/Internal/aux.h
index d055d35..83111e5 100644
--- a/lib/Data/Packed/Internal/aux.h
+++ b/lib/Data/Packed/Internal/aux.h
@@ -24,3 +24,5 @@ int submatrixR(int r1, int r2, int c1, int c2, KRMAT(x),RMAT(r));
 
 int diagR(KRVEC(d),RMAT(r));
 int diagC(KCVEC(d),CMAT(r));
+
+const char * gsl_strerror (const int gsl_errno);