diff --git a/os/hal/platforms/STM32/i2c_lld.c b/os/hal/platforms/STM32/i2c_lld.c
index 14b3f84da..c81fdad28 100644
--- a/os/hal/platforms/STM32/i2c_lld.c
+++ b/os/hal/platforms/STM32/i2c_lld.c
@@ -768,7 +768,7 @@ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
   I2C_TypeDef *dp = i2cp->i2c;
   VirtualTimer vt;
 
-#if defined(STM32F1XX)
+#if defined(STM32F1XX_I2C)
   chDbgCheck((rxbytes > 1), "i2c_lld_master_receive_timeout");
 #endif
 
@@ -849,7 +849,7 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
   I2C_TypeDef *dp = i2cp->i2c;
   VirtualTimer vt;
 
-#if defined(STM32F1XX)
+#if defined(STM32F1XX_I2C)
   chDbgCheck(((rxbytes == 0) || ((rxbytes > 1) && (rxbuf != NULL))),
              "i2c_lld_master_transmit_timeout");
 #endif
diff --git a/os/hal/platforms/STM32/i2c_lld.h b/os/hal/platforms/STM32/i2c_lld.h
index d8cb89881..0bc19bfe1 100644
--- a/os/hal/platforms/STM32/i2c_lld.h
+++ b/os/hal/platforms/STM32/i2c_lld.h
@@ -206,6 +206,14 @@
 #define STM32_I2C_I2C2_TX_DMA_STREAM     STM32_DMA_STREAM_ID(1, 4)
 
 #endif /* !STM32_ADVANCED_DMA*/
+
+/* Flag for whole STM32F1XX family. */
+#if defined(STM32F10X_LD_VL) || defined(STM32F10X_MD_VL) || \
+    defined(STM32F10X_LD)    || defined(STM32F10X_MD)    || \
+    defined(STM32F10X_HD)    || defined(STM32F10X_XL)    || \
+                                defined(STM32F10X_CL)
+#define STM32F1XX_I2C
+#endif
 /** @} */
 
 /*===========================================================================*/