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-rw-r--r--src/include/storage/spin.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/storage/spin.h b/src/include/storage/spin.h
index 70070ca9ab..7031f1d2c5 100644
--- a/src/include/storage/spin.h
+++ b/src/include/storage/spin.h
@@ -71,7 +71,7 @@ extern Size SpinlockSemaSize(void);
#ifndef HAVE_SPINLOCKS
extern void SpinlockSemaInit(void);
-extern PGSemaphore *SpinlockSemaArray;
+extern PGDLLIMPORT PGSemaphore *SpinlockSemaArray;
#endif
#endif /* SPIN_H */