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-rw-r--r--c_src/internal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/c_src/internal.c b/c_src/internal.c
index 462484f..10ca5a1 100644
--- a/c_src/internal.c
+++ b/c_src/internal.c
@@ -18,7 +18,7 @@
// register_callback_process
-ErlNifPid callback_process;
+static ErlNifPid callback_process;
NIF_FUNCTION(register_callback_process)
{