diff --git a/barista/ntc.c b/barista/ntc.c
index 4d7c287..25f8f7e 100644
--- a/barista/ntc.c
+++ b/barista/ntc.c
@@ -37,7 +37,7 @@ ntc_temp(float R)
 float
 ntc_resistance(int Vo)
 {
-	float R1 = 6.8e3; /* Resistor for voltage divider */
+	float R1 = 10.0e3; /* Resistor for voltage divider */
 	float R2 = R1 * (1023.0 / (float)Vo - 1.0);
 
 	return R2;