diff --git a/cde/programs/dtmail/libDtMail/RFC/MIMEBodyPart.C b/cde/programs/dtmail/libDtMail/RFC/MIMEBodyPart.C
index 7ec705808..013425453 100644
--- a/cde/programs/dtmail/libDtMail/RFC/MIMEBodyPart.C
+++ b/cde/programs/dtmail/libDtMail/RFC/MIMEBodyPart.C
@@ -984,9 +984,9 @@ MIMEBodyPart::parameterValue(
           vtok++;
 
         if (isCaseSensitive)
-          rtn = strncmp(vtok, parameter, sizeof(parameter));
+            rtn = strncmp(vtok, parameter, strlen(vtok));
         else
-          rtn = strncasecmp(vtok, parameter, sizeof(parameter));
+            rtn = strncasecmp(vtok, parameter, strlen(vtok));
 
         if (0 == rtn)
         {