diff --git a/communication_techniques/parsing.sh b/communication_techniques/parsing.sh
index 54e0487..80ab71c 100755
--- a/communication_techniques/parsing.sh
+++ b/communication_techniques/parsing.sh
@@ -103,7 +103,7 @@ contains_zero()
 		iMax=$((lineNum + 1 + nbCommTechs * 3))
 		for i in $(seq $iMin 3 $iMax)
 		do
-			if head -$i $datFile | tail -1 | egrep "\.0+([^[:digit:]])?" > /dev/null
+			if head -$i $datFile | tail -1 | grep -E "\.0+([^[:digit:]])?$" > /dev/null
 			then
 				return 0
 			fi
@@ -115,7 +115,7 @@ contains_zero()
 		iMax=$((iMin + nbArg * 8 - 4))
 		for i in $(seq $iMin 4 $iMax)
 		do
-			if head -$i $datFile | tail -1 | egrep "\.0+([^[:digit:]])?" > /dev/null
+			if head -$i $datFile | tail -1 | grep -E "\.0+([^[:digit:]])?$" > /dev/null
 			then
 				return 0
 			fi