diff --git a/src/include/86box/hwm.h b/src/include/86box/hwm.h
index 72d5cc208..27cb4a921 100644
--- a/src/include/86box/hwm.h
+++ b/src/include/86box/hwm.h
@@ -25,7 +25,7 @@
 typedef struct {
     uint16_t	fans[4];
     uint8_t	temperatures[4];
-    uint16_t	voltages[9];
+    uint16_t	voltages[10];
 } hwm_values_t;
 
 typedef struct {