diff --git a/src/libecoprimer/ecoprimer.h b/src/libecoprimer/ecoprimer.h
index 0a9989a..0110e2c 100644
--- a/src/libecoprimer/ecoprimer.h
+++ b/src/libecoprimer/ecoprimer.h
@@ -179,6 +179,7 @@ typedef struct {
 	uint32_t 		mind;				//< minimum distance between primers
 	uint32_t		maxd;				//< maximum distance between primers
 	uint32_t        sumd;				//< distance sum
+	uint32_t        amplifiacount;
 	float			yule;
 	float			quorumin;
 	float           quorumout;
diff --git a/src/libecoprimer/pairs.c b/src/libecoprimer/pairs.c
index 64d8905..08e3ac4 100644
--- a/src/libecoprimer/pairs.c
+++ b/src/libecoprimer/pairs.c
@@ -274,6 +274,7 @@ static void buildPrimerPairsForOneSeq(uint32_t seqid,
 		    	   current.maxd=DMAX;
 		    	   current.mind=DMAX;
 		    	   current.sumd=0;
+		    	   current.amplifiacount=0;
 	    		   current.inexample=0;
 	    		   current.outexample=0;
 				   current.curseqid = 0;
@@ -343,6 +344,7 @@ static void buildPrimerPairsForOneSeq(uint32_t seqid,
 				   {
 		    		   //pcurrent->inexample++;
 		    		   pcurrent->sumd+=distance;
+		    		   pcurrent->amplifiacount++;
 
 		    		   if ((pcurrent->maxd==DMAX) || (distance > pcurrent->maxd))
 			    		   pcurrent->maxd = distance;