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-rw-r--r--src/common/utils.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/common/utils.h b/src/common/utils.h
index 3f181ef12..c5f64124f 100644
--- a/src/common/utils.h
+++ b/src/common/utils.h
@@ -24,6 +24,9 @@
#include "common/hercules.h"
#include <stdio.h> // FILE*
+#ifndef WIN32
+# include <unistd.h> // sleep()
+#endif
/* [HCache] 1-byte key to ensure our method is the latest, we can modify to ensure the method matches */
#define HCACHE_KEY 'k'