diff --git a/gui/teatime/teatime.tal b/gui/teatime/teatime.tal
index 4cb09dc..5d029f6 100644
--- a/gui/teatime/teatime.tal
+++ b/gui/teatime/teatime.tal
@@ -134,10 +134,14 @@
 	[ LIT2 15 -Screen/auto ] DEO
 	.remaining-seconds LDZ2 ORAk ?{ POP2 ;dict/min0 !<draw-uf2> }
 	( | minutes )
-	( x0 ) DUP2 #0258 DIV2 NIP [ LIT "0 ] ADD <draw-char>
-	( 0x ) DUP2 #003c DIV2 NIP #0a DIVk MUL SUB [ LIT "0 ] ADD <draw-char>
-	POP2 ;dict/min0 <draw-uf2>
-	JMP2r
+	( x0 ) DUP2 #0258 DIV2 NIP DUP #00 EQU ?{
+		DUP [ LIT "0 ] ADD <draw-char> }
+	POP
+	( 0x ) DUP2 #003c DIV2 NIP <draw-uf2-dec>
+	( : ) [ LIT ": ] <draw-char>
+	( | seconds )
+	( x0 ) DUP2 #003c DIV2k MUL2 SUB2 #000a DIV2 NIP <draw-uf2-dec>
+	( 0x ) #000a DIV2k MUL2 SUB2 NIP !<draw-uf2-dec>
 
 @<draw-labels> ( -- )
 	#003c .Screen/x DEO2
@@ -158,6 +162,10 @@
 		INC2 LDAk ?&>while
 	POP2 JMP2r
 
+@<draw-uf2-dec> ( -- )
+	#0a DIVk MUL SUB [ LIT "0 ] ADD
+	( >> )
+
 @<draw-char> ( char -- )
 	#20 SUB #00 SWP
 	( addr ) DUP2 #50 SFT2 ;font/glyphs ADD2 .Screen/addr DEO2