diff --git a/src/calls-emergency-call-types.c b/src/calls-emergency-call-types.c
index 9f59a79..ede52d5 100644
--- a/src/calls-emergency-call-types.c
+++ b/src/calls-emergency-call-types.c
@@ -30,7 +30,7 @@ typedef struct {
   CallsEmergencyNumber  numbers[3];
 } CallsEmergencyNumberTypes;
 
-GHashTable *by_mcc;
+static GHashTable *by_mcc;
 
 CallsEmergencyNumberTypes emergency_number_types[] = {
   { "AT",