diff --git a/src/authenticator.c b/src/authenticator.c
index ed912db..76ab958 100644
--- a/src/authenticator.c
+++ b/src/authenticator.c
@@ -25,7 +25,7 @@ TextLayer label;
 TextLayer token;
 TextLayer ticker;
 int curToken = 0;
-int tZone;
+float tZone;
 bool changed;
 
 /* from sha1.c from liboauth */