diff --git a/os/hal/platforms/STM32/hal_lld_f103.h b/os/hal/platforms/STM32/hal_lld_f103.h
index 3d868e197..9c6541231 100644
--- a/os/hal/platforms/STM32/hal_lld_f103.h
+++ b/os/hal/platforms/STM32/hal_lld_f103.h
@@ -324,6 +324,21 @@
 #error "STM32_ADCCLK exceeding maximum frequency (14MHz)"
 #endif
 
+/**
+ * @brief   Timers clocks.
+ */
+#if (STM32_PPRE1 == STM32_PPRE1_DIV1) || defined(__DOXYGEN__)
+#define STM32_TIMCLK1   (STM32_PCLK1 * 1)
+#else
+#define STM32_TIMCLK1   (STM32_PCLK1 * 2)
+#endif
+
+#if (STM32_PPRE2 == STM32_PPRE2_DIV1) || defined(__DOXYGEN__)
+#define STM32_TIMCLK2   (STM32_PCLK2 * 1)
+#else
+#define STM32_TIMCLK2   (STM32_PCLK2 * 2)
+#endif
+
 /**
  * @brief   Flash settings.
  */