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-rw-r--r--src/proj.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/proj.h b/src/proj.h
index fbd59b45..f4640e15 100644
--- a/src/proj.h
+++ b/src/proj.h
@@ -382,9 +382,9 @@ double proj_xyz_dist (XYZ a, XYZ b);
/* Set or read error level */
int proj_errno (PJ *P);
-void proj_errno_set (PJ *P, int err);
+int proj_errno_set (PJ *P, int err);
int proj_errno_reset (PJ *P);
-void proj_errno_restore (PJ *P, int err);
+int proj_errno_restore (PJ *P, int err);
PJ_DERIVS proj_derivatives(PJ *P, const LP lp);