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-rw-r--r--lib/birdlib.h1
-rw-r--r--proto/ospf/lsalib.c2
2 files changed, 2 insertions, 1 deletions
diff --git a/lib/birdlib.h b/lib/birdlib.h
index fc27db9b..1904d666 100644
--- a/lib/birdlib.h
+++ b/lib/birdlib.h
@@ -19,6 +19,7 @@
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
+#define ABS(a) ((a)>=0 ? (a) : -(a))
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
#ifndef NULL
diff --git a/proto/ospf/lsalib.c b/proto/ospf/lsalib.c
index 46dc707a..cf45fd4e 100644
--- a/proto/ospf/lsalib.c
+++ b/proto/ospf/lsalib.c
@@ -399,7 +399,7 @@ lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2)
if((l1->age==LSA_MAXAGE)&&(l2->age!=LSA_MAXAGE)) return CMP_NEWER;
if((l2->age==LSA_MAXAGE)&&(l1->age!=LSA_MAXAGE)) return CMP_OLDER;
- if(abs(l1->age-l2->age)>LSA_MAXAGEDIFF)
+ if(ABS(l1->age-l2->age)>LSA_MAXAGEDIFF)
return l1->age<l2->age ? CMP_NEWER : CMP_OLDER;
return CMP_SAME;