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-rw-r--r--compiler/parser/cutils.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/parser/cutils.c b/compiler/parser/cutils.c
index e458c080a1..fdaea44cc7 100644
--- a/compiler/parser/cutils.c
+++ b/compiler/parser/cutils.c
@@ -9,7 +9,7 @@ places in the GHC library.
#include <string.h>
-#ifdef HAVE_UNISTD_H
+#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif