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-rw-r--r--src/file.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/file.c b/src/file.c
index ea508ce05..e1db3f960 100644
--- a/src/file.c
+++ b/src/file.c
@@ -276,7 +276,9 @@ mrb_file__gethome(mrb_state *mrb, mrb_value klass)
mrb_value
mrb_file_flock(mrb_state *mrb, mrb_value self)
{
-#if !defined(sun)
+#if defined(sun)
+ mrb_raise(mrb, E_RUNTIME_ERROR, "flock is not supported on Illumos/Solaris");
+#else
mrb_int operation;
int fd;