diff --git a/oximeter/oximeter/schema/dendrite.toml b/oximeter/oximeter/schema/dendrite.toml
index 400514c4e40..ca1497b447f 100644
--- a/oximeter/oximeter/schema/dendrite.toml
+++ b/oximeter/oximeter/schema/dendrite.toml
@@ -66,11 +66,11 @@ type = "u8"
 description = "Wafer number of the switch the link is on"
 
 [fields.switch_wafer_loc_x]
-type = "i8"
+type = "i16"
 description = "X-coordinate wafer location of the switch the link is on"
 
 [fields.switch_wafer_loc_y]
-type = "i8"
+type = "i16"
 description = "Y-coordinate wafer location of the switch the link is on"
 
 [fields.switch_serial]
diff --git a/oximeter/oximeter/schema/switch-data-link.toml b/oximeter/oximeter/schema/switch-data-link.toml
index 8919ff45a01..dce4841a096 100644
--- a/oximeter/oximeter/schema/switch-data-link.toml
+++ b/oximeter/oximeter/schema/switch-data-link.toml
@@ -265,11 +265,11 @@ type = "u8"
 description = "Wafer number of the switch the link is on"
 
 [fields.switch_wafer_loc_x]
-type = "i8"
+type = "i16"
 description = "X-coordinate wafer location of the switch the link is on"
 
 [fields.switch_wafer_loc_y]
-type = "i8"
+type = "i16"
 description = "Y-coordinate wafer location of the switch the link is on"
 
 [fields.switch_model]