diff --git a/src/encoding.cpp b/src/encoding.cpp
index a5e7f8af..38bc175d 100644
--- a/src/encoding.cpp
+++ b/src/encoding.cpp
@@ -1739,7 +1739,7 @@ void write_packet_neighbour_cell_data(RlcMacDownlink_t *block,
 
 	block->PAYLOAD_TYPE = 0x1;  // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
 	block->RRBP         = 0;  // 0: N+13
-	block->SP           = 0; // RRBP field is valid
+	block->SP           = 0; // RRBP field is not valid
 	block->USF          = 0x0;  // Uplink state flag
 
 	block->u.Packet_Neighbour_Cell_Data.MESSAGE_TYPE = MT_PACKET_NEIGHBOUR_CELL_DATA;
@@ -1764,7 +1764,7 @@ void write_packet_cell_change_continue(RlcMacDownlink_t *block,
 
 	block->PAYLOAD_TYPE = 0x1;  // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
 	block->RRBP         = 0;  // 0: N+13
-	block->SP           = 0; // RRBP field is valid
+	block->SP           = 0; // RRBP field is not valid
 	block->USF          = 0x0;  // Uplink state flag
 
 	block->u.Packet_Cell_Change_Continue.MESSAGE_TYPE = MT_PACKET_CELL_CHANGE_CONTINUE;