diff --git a/tasmota/xsns_24_si1145.ino b/tasmota/xsns_24_si1145.ino
index e7d4e8577..032896806 100644
--- a/tasmota/xsns_24_si1145.ino
+++ b/tasmota/xsns_24_si1145.ino
@@ -202,7 +202,7 @@ uint16_t Si1145ReadHalfWord(uint8_t reg)
   return I2cRead16LE(SI114X_ADDR, reg);
 }
 
-bool Si1145WriteByte(uint8_t reg, uint16_t val)
+void Si1145WriteByte(uint8_t reg, uint16_t val)
 {
   I2cWrite8(SI114X_ADDR, reg, val);
 }
diff --git a/tasmota/xsns_57_tsl2591.ino b/tasmota/xsns_57_tsl2591.ino
index ae7bdba8d..395b69b23 100644
--- a/tasmota/xsns_57_tsl2591.ino
+++ b/tasmota/xsns_57_tsl2591.ino
@@ -52,7 +52,7 @@ void Tsl2591Init(void)
   }
 }
 
-bool Tsl2591Read(void)
+void Tsl2591Read(void)
 {
   uint32_t lum = tsl.getFullLuminosity();
   uint16_t ir, full;