diff --git a/subsys/net/lib/lwm2m/lwm2m_engine.h b/subsys/net/lib/lwm2m/lwm2m_engine.h
index 7a2cc7b9a9e1e9..251ba8a32c9a15 100644
--- a/subsys/net/lib/lwm2m/lwm2m_engine.h
+++ b/subsys/net/lib/lwm2m/lwm2m_engine.h
@@ -14,7 +14,7 @@
 #include "lwm2m_registry.h"
 
 #define LWM2M_PROTOCOL_VERSION_MAJOR 1
-#if CONFIG_LWM2M_VERSION_1_1
+#if defined(CONFIG_LWM2M_VERSION_1_1)
 #define LWM2M_PROTOCOL_VERSION_MINOR 1
 #else
 #define LWM2M_PROTOCOL_VERSION_MINOR 0