diff --git a/os/nil/include/ch.h b/os/nil/include/ch.h
index 1e58b43f3..43cedf119 100644
--- a/os/nil/include/ch.h
+++ b/os/nil/include/ch.h
@@ -279,7 +279,7 @@
 
 #if (CH_LICENSE_FEATURES != CH_FEATURES_FULL) &&                            \
     (CH_LICENSE_FEATURES != CH_FEATURES_INTERMEDIATE) &&                    \
-    (CH_LICENSE_FEATURES == CH_FEATURES_BASIC)
+    (CH_LICENSE_FEATURES != CH_FEATURES_BASIC)
 #error "invalid CH_LICENSE_FEATURES setting"
 #endif
 
@@ -303,6 +303,10 @@
 #undef CH_CFG_ST_TIMEDELTA
 #define CH_CFG_ST_TIMEDELTA                 0
 
+/* Messages restricted.*/
+#undef CH_CFG_USE_MESSAGES
+#define CH_CFG_USE_MESSAGES                 FALSE
+
 #endif /* CH_LICENSE_FEATURES == CH_FEATURES_BASIC */
 
 #if !defined(_CHIBIOS_NIL_CONF_)
diff --git a/readme.txt b/readme.txt
index 6f0d16be2..b66b3fdb8 100644
--- a/readme.txt
+++ b/readme.txt
@@ -85,6 +85,8 @@
 - HAL: Added a new interface for range-finder devices (used by EX).
 - HAL: Added mcuconf.h updater tool for STM32F407 (backported to 19.1.1).
 - NIL: Integrated NIL 4.0.
+- FIX: Fixed wrong license restriction check in Nil (bug #1011)
+       (backported to 19.1.1)(backported to 18.2.3).
 - FIX: Fixed uninitialized variables in STM32 DMA drivers (bug #1010)
        (backported to 19.1.1).
 - FIX: Fixed wrong mcuconf.h in some testex demos related to STM32F407