diff --git a/include/psyc.h b/include/psyc.h
index abcf9d3..b33e96a 100644
--- a/include/psyc.h
+++ b/include/psyc.h
@@ -120,9 +120,14 @@ unsigned int psyc_version ()
 	return 1;
 }
 
-/// Routing vars in alphabetical order.
-extern const psycString PSYC_routingVars[];
-extern const psycMatchVar PSYC_varTypes[];
+/// Routing variables in alphabetical order.
+extern const psycString psyc_routingVars[];
+
+// Variable types in alphabetical order.
+extern const psycMatchVar psyc_varTypes[];
+
+extern const size_t psyc_routingVarsNum;
+extern const size_t psyc_varTypesNum;
 
 /**
  * Is this a routing variable name?
diff --git a/src/variable.c b/src/variable.c
index e9c96d7..472e105 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -1,8 +1,8 @@
 #include "lib.h"
 #include <stdint.h>
 
-/// Routing variables in alphabetical order.
 
+/// Routing variables in alphabetical order.
 const psycString psyc_routingVars[] =
 {
 	PSYC_C2STR("_amount_fragments"),
@@ -26,6 +26,7 @@ const psycString psyc_routingVars[] =
 	//PSYC_C2STR("_using_modules"),		// older PSYC
 };
 
+// Variable types in alphabetical order.
 const psycMatchVar psyc_varTypes[] =
 {
 	{PSYC_C2STR("_amount"),   PSYC_TYPE_AMOUNT},