diff --git a/libraries/Wire/src/Wire.cpp b/libraries/Wire/src/Wire.cpp
index 1593e47..c82dbe4 100644
--- a/libraries/Wire/src/Wire.cpp
+++ b/libraries/Wire/src/Wire.cpp
@@ -309,7 +309,7 @@ void TwoWire::onRequest( void (*function)(void) )
 }
 
 // С function for trap handler
-extern "C" void wire_interrupt_handler(void) 
+extern "C" void __attribute__((optimize("O3"))) wire_interrupt_handler(void) 
 {
   twi_interruptHandler();
 }
diff --git a/libraries/Wire/src/utility/twi.c b/libraries/Wire/src/utility/twi.c
index 0d4c86b..1978655 100644
--- a/libraries/Wire/src/utility/twi.c
+++ b/libraries/Wire/src/utility/twi.c
@@ -323,7 +323,7 @@ void twi_attachSlaveTxEvent( void (*function)(void) )
  * Input    none
  * Output   none
  */
-void twi_interruptHandler(void)
+void __attribute__((optimize("O3"))) twi_interruptHandler(void)
 {
   uint32_t int_mask = HAL_I2C_Get_CR1_Content(&hi2c) & I2C_INTMASK; // interrupts allowed
   uint32_t interrupt_status = HAL_I2C_Get_Interrupts_Status(&hi2c); // current flags