diff --git a/Src/stm32f1xx_hal_rcc.c b/Src/stm32f1xx_hal_rcc.c
index 82631e7..491e59b 100644
--- a/Src/stm32f1xx_hal_rcc.c
+++ b/Src/stm32f1xx_hal_rcc.c
@@ -1082,14 +1082,14 @@
 uint32_t HAL_RCC_GetSysClockFreq(void)
 {
 #if defined(RCC_CFGR2_PREDIV1SRC)
-  const uint8_t aPLLMULFactorTable[14] = {0, 0, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 13};
-  const uint8_t aPredivFactorTable[16] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+  static const uint8_t aPLLMULFactorTable[14U] = {0, 0, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 13};
+  static const uint8_t aPredivFactorTable[16U] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
 #else
-  const uint8_t aPLLMULFactorTable[16] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16};
+  static const uint8_t aPLLMULFactorTable[16U] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16};
 #if defined(RCC_CFGR2_PREDIV1)
-  const uint8_t aPredivFactorTable[16] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+  static const uint8_t aPredivFactorTable[16U] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
 #else
-  const uint8_t aPredivFactorTable[2] = {1, 2};
+  static const uint8_t aPredivFactorTable[2U] = {1, 2};
 #endif /*RCC_CFGR2_PREDIV1*/
 
 #endif
diff --git a/Src/stm32f1xx_hal_rcc_ex.c b/Src/stm32f1xx_hal_rcc_ex.c
index c89e15e..4226403 100644
--- a/Src/stm32f1xx_hal_rcc_ex.c
+++ b/Src/stm32f1xx_hal_rcc_ex.c
@@ -386,16 +386,16 @@
 uint32_t HAL_RCCEx_GetPeriphCLKFreq(uint32_t PeriphClk)
 {
 #if defined(STM32F105xC) || defined(STM32F107xC)
-  const uint8_t aPLLMULFactorTable[14] = {0, 0, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 13};
-  const uint8_t aPredivFactorTable[16] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
+  static const uint8_t aPLLMULFactorTable[14U] = {0, 0, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 13};
+  static const uint8_t aPredivFactorTable[16U] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
 
   uint32_t prediv1 = 0U, pllclk = 0U, pllmul = 0U;
   uint32_t pll2mul = 0U, pll3mul = 0U, prediv2 = 0U;
 #endif /* STM32F105xC || STM32F107xC */
 #if defined(STM32F102x6) || defined(STM32F102xB) || defined(STM32F103x6) || \
     defined(STM32F103xB) || defined(STM32F103xE) || defined(STM32F103xG)
-  const uint8_t aPLLMULFactorTable[16] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16};
-  const uint8_t aPredivFactorTable[2] = {1, 2};
+  static const uint8_t aPLLMULFactorTable[16U] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 16};
+  static const uint8_t aPredivFactorTable[2U] = {1, 2};
 
   uint32_t prediv1 = 0U, pllclk = 0U, pllmul = 0U;
 #endif /* STM32F102x6 || STM32F102xB || STM32F103x6 || STM32F103xB || STM32F103xE || STM32F103xG */