diff --git a/pvDataApp/misc/requester.cpp b/pvDataApp/misc/requester.cpp
index d9b826e..0e1bbaa 100644
--- a/pvDataApp/misc/requester.cpp
+++ b/pvDataApp/misc/requester.cpp
@@ -8,7 +8,8 @@
 #include <pv/requester.h>
 namespace epics { namespace pvData { 
 
-static std::string typeName[] = {
+const size_t messageTypeCount = 4; 
+static std::string typeName[messageTypeCount] = {
     String("info"),
     String("warning"),
     String("error"),
@@ -16,5 +17,4 @@ static std::string typeName[] = {
 };
 
 StringArray messageTypeName = typeName;
-    
 }}
diff --git a/pvDataApp/misc/requester.h b/pvDataApp/misc/requester.h
index d36a432..1add4cc 100644
--- a/pvDataApp/misc/requester.h
+++ b/pvDataApp/misc/requester.h
@@ -19,7 +19,7 @@ enum MessageType {
 };
 
 extern StringArray messageTypeName;
-
+extern const size_t messageTypeCount;
 class Requester {
 public:
     POINTER_DEFINITIONS(Requester);