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-rw-r--r--pd/src/m_class.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/pd/src/m_class.c b/pd/src/m_class.c
index cd4fbb1c..93d9c71b 100644
--- a/pd/src/m_class.c
+++ b/pd/src/m_class.c
@@ -7,7 +7,7 @@
#include "m_imp.h"
#include "s_stuff.h"
#include <stdlib.h>
-#ifdef UNISTD
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef MSW