diff --git a/command/sol_cmds.hpp b/command/sol_cmds.hpp
index 9aedfdd..b18b292 100644
--- a/command/sol_cmds.hpp
+++ b/command/sol_cmds.hpp
@@ -34,13 +34,13 @@
 struct ActivatingRequest
 {
 #if BYTE_ORDER == LITTLE_ENDIAN
-    uint8_t sessionState : 4; //!< SOL session state.
-    uint8_t reserved : 4;     //!< Reserved.
+    uint8_t sessionState:4; //!< SOL session state.
+    uint8_t reserved:4;     //!< Reserved.
 #endif
 
 #if BYTE_ORDER == BIG_ENDIAN
-    uint8_t reserved : 4;     //!< Reserved.
-    uint8_t sessionState : 4; //!< SOL session state.
+    uint8_t reserved:4;     //!< Reserved.
+    uint8_t sessionState:4; //!< SOL session state.
 #endif
 
     uint8_t payloadInstance; //!< Payload instance.