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-rw-r--r--rts/sm/CNF.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/rts/sm/CNF.h b/rts/sm/CNF.h
index c4655dc92d..6482130d2b 100644
--- a/rts/sm/CNF.h
+++ b/rts/sm/CNF.h
@@ -29,7 +29,7 @@ StgWord compactContains(StgCompactNFData *str,
StgPtr what);
StgWord countCompactBlocks(bdescr *outer);
-#ifdef DEBUG
+#if defined(DEBUG)
StgWord countAllocdCompactBlocks(bdescr *outer);
#endif