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-rw-r--r--tests/test-coroutine.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/test-coroutine.c b/tests/test-coroutine.c
index e22fae170a..27d1b6f8e8 100644
--- a/tests/test-coroutine.c
+++ b/tests/test-coroutine.c
@@ -337,7 +337,7 @@ static void perf_cost(void)
"%luns per coroutine",
maxcycles,
duration, ops,
- (unsigned long)(1000000000 * duration) / maxcycles);
+ (unsigned long)(1000000000.0 * duration / maxcycles));
}
int main(int argc, char **argv)