diff --git a/chip/lm4/config.h b/chip/lm4/config.h
index 4ae55d185f..d1c892bd68 100644
--- a/chip/lm4/config.h
+++ b/chip/lm4/config.h
@@ -11,7 +11,7 @@
 #define CONFIG_RAM_SIZE         0x00008000
 
 /* Size of one firmware image in flash */
-#define CONFIG_FW_IMAGE_SIZE    (32 * 1024)
+#define CONFIG_FW_IMAGE_SIZE    (40 * 1024)
 #define CONFIG_FW_RO_OFF        0
 #define CONFIG_FW_A_OFF         CONFIG_FW_IMAGE_SIZE
 #define CONFIG_FW_B_OFF         (2 * CONFIG_FW_IMAGE_SIZE)