diff --git a/cpu/stm32f1/include/cpu_conf.h b/cpu/stm32f1/include/cpu_conf.h
index 16a6bf672b..3b73eb1b0e 100644
--- a/cpu/stm32f1/include/cpu_conf.h
+++ b/cpu/stm32f1/include/cpu_conf.h
@@ -52,12 +52,16 @@ extern "C" {
  * @brief   Flash page configuration
  * @{
  */
+#if defined(CPU_MODEL_STM32F103C8) || defined(CPU_MODEL_STM32F103CB) || defined(CPU_MODEL_STM32F103RB)
+#define FLASHPAGE_SIZE      (1024U)
+#elif defined(CPU_MODEL_STM32F103RE) || defined(CPU_MODEL_STM32F103ZE)
 #define FLASHPAGE_SIZE      (2048U)
+#endif
 
 #if defined(CPU_MODEL_STM32F103C8)
-#define FLASHPAGE_NUMOF     (32U)
-#elif defined(CPU_MODEL_STM32F103CB) || defined(CPU_MODEL_STM32F103RB)
 #define FLASHPAGE_NUMOF     (64U)
+#elif defined(CPU_MODEL_STM32F103CB) || defined(CPU_MODEL_STM32F103RB)
+#define FLASHPAGE_NUMOF     (128U)
 #elif defined(CPU_MODEL_STM32F103RE) || defined(CPU_MODEL_STM32F103ZE)
 #define FLASHPAGE_NUMOF     (256U)
 #endif