diff --git a/SQLClient.m b/SQLClient.m
index 08284c6..4160153 100644
--- a/SQLClient.m
+++ b/SQLClient.m
@@ -1622,7 +1622,7 @@ static unsigned int	maxConnections = 8;
 
 - (NSString*) quoteBigInteger: (int64_t)i
 {
-  return [NSString stringWithFormat: @"%lld", i];
+  return [NSString stringWithFormat: @"%lld", (long long)i];
 }
 
 - (NSString*) quoteCString: (const char *)s