diff --git a/os/hal/platforms/STM32F2xx/hal_lld.h b/os/hal/platforms/STM32F2xx/hal_lld.h
index c93aa29a7..6a9fb50d1 100644
--- a/os/hal/platforms/STM32F2xx/hal_lld.h
+++ b/os/hal/platforms/STM32F2xx/hal_lld.h
@@ -319,7 +319,7 @@
 #define STM32_I2C1_RX_DMA_CHN   0x00100001
 #define STM32_I2C1_TX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 7)) |           \
                                  (STM32_DMA_STREAM_ID_MSK(1, 6))
-#define STM32_I2C1_TX_DMA_CHN   0x10000000
+#define STM32_I2C1_TX_DMA_CHN   0x11000000
 
 #define STM32_HAS_I2C2          TRUE
 #define STM32_I2C2_RX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 2) |            \
diff --git a/os/hal/platforms/STM32F4xx/hal_lld.h b/os/hal/platforms/STM32F4xx/hal_lld.h
index 06bd3e198..9d3dcaa05 100644
--- a/os/hal/platforms/STM32F4xx/hal_lld.h
+++ b/os/hal/platforms/STM32F4xx/hal_lld.h
@@ -318,7 +318,7 @@
 #define STM32_I2C1_RX_DMA_CHN   0x00100001
 #define STM32_I2C1_TX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 7)) |           \
                                  (STM32_DMA_STREAM_ID_MSK(1, 6))
-#define STM32_I2C1_TX_DMA_CHN   0x10000000
+#define STM32_I2C1_TX_DMA_CHN   0x11000000
 
 #define STM32_HAS_I2C2          TRUE
 #define STM32_I2C2_RX_DMA_MSK   (STM32_DMA_STREAM_ID_MSK(1, 2) |            \
diff --git a/readme.txt b/readme.txt
index 70c49377c..0b03c009c 100644
--- a/readme.txt
+++ b/readme.txt
@@ -79,6 +79,8 @@
 *****************************************************************************
 
 *** 2.5.0 ***
+- FIX: Fixed STM32 I2C1 wrong alternate TX DMA setting (bug 3524088)
+  (backported to 2.4.1).
 - FIX: Fixed system state check problem related to FatFS (bug 3523769).
 - FIX: Fixed three testhal builds fail (bug 3523322)(backported to 2.4.1).
 - FIX: Fixed MAC driver functions with invalid name (bug 3522808)(backported