diff --git a/radio/src/simpgmspace.cpp b/radio/src/simpgmspace.cpp
index d22716f8a..a656391eb 100644
--- a/radio/src/simpgmspace.cpp
+++ b/radio/src/simpgmspace.cpp
@@ -60,6 +60,7 @@ GPIO_TypeDef gpiod;
 GPIO_TypeDef gpioe;
 TIM_TypeDef tim1;
 TIM_TypeDef tim3;
+TIM_TypeDef tim4;
 TIM_TypeDef tim8;
 TIM_TypeDef tim10;
 RCC_TypeDef rcc;
diff --git a/radio/src/simpgmspace.h b/radio/src/simpgmspace.h
index d3684200f..d2feb61f4 100644
--- a/radio/src/simpgmspace.h
+++ b/radio/src/simpgmspace.h
@@ -116,6 +116,7 @@ extern GPIO_TypeDef gpioe;
 #define GPIOE (&gpioe)
 extern TIM_TypeDef tim1;
 extern TIM_TypeDef tim3;
+extern TIM_TypeDef tim4;
 extern TIM_TypeDef tim8;
 extern TIM_TypeDef tim10;
 #undef TIM1
@@ -124,6 +125,7 @@ extern TIM_TypeDef tim10;
 #undef TIM10
 #define TIM1 (&tim1)
 #define TIM3 (&tim3)
+#define TIM4 (&tim4)
 #define TIM8 (&tim8)
 #define TIM10 (&tim10)
 extern RCC_TypeDef rcc;