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-rw-r--r--src/backend/utils/adt/timestamp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index f69fa0f3a73..4d3a8f9af21 100644
--- a/src/backend/utils/adt/timestamp.c
+++ b/src/backend/utils/adt/timestamp.c
@@ -7,7 +7,7 @@
#include "utils/builtins.h"
/* sunos doesn't have this function */
-#if defined(sunos)
+#if defined(sunos4)
#define difftime(time1,time0) ((time1) - (time0))
#endif