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-rw-r--r--passes/hierarchy/hierarchy.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/passes/hierarchy/hierarchy.cc b/passes/hierarchy/hierarchy.cc
index 4b414d3c..2a7e9634 100644
--- a/passes/hierarchy/hierarchy.cc
+++ b/passes/hierarchy/hierarchy.cc
@@ -21,7 +21,11 @@
#include <stdlib.h>
#include <stdio.h>
#include <set>
-#include <unistd.h>
+
+#ifndef _WIN32
+# include <unistd.h>
+#endif
+
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN