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-rw-r--r--block_int.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h
index 97b1c2be54..e2799e4f6b 100644
--- a/block_int.h
+++ b/block_int.h
@@ -39,6 +39,7 @@
#define BLOCK_IO_LIMIT_TOTAL 2
#define BLOCK_IO_SLICE_TIME 100000000
+#define NANOSECONDS_PER_SECOND 1000000000.0
#define BLOCK_OPT_SIZE "size"
#define BLOCK_OPT_ENCRYPT "encryption"