diff --git a/src/command.c b/src/command.c
index 015cdb8e..39c09458 100644
--- a/src/command.c
+++ b/src/command.c
@@ -108,7 +108,7 @@ error:
 }
 
 // Encode a message
-uint_fast8_t
+static uint_fast8_t
 command_encodef(uint8_t *buf, const struct command_encoder *ce, va_list args)
 {
     uint_fast8_t max_size = READP(ce->max_size);
@@ -172,7 +172,7 @@ error:
 }
 
 // Add header and trailer bytes to a message block
-void
+static void
 command_add_frame(uint8_t *buf, uint_fast8_t msglen)
 {
     buf[MESSAGE_POS_LEN] = msglen;
diff --git a/src/command.h b/src/command.h
index 67e595bc..894114d7 100644
--- a/src/command.h
+++ b/src/command.h
@@ -74,9 +74,6 @@ enum {
 void *command_decode_ptr(uint32_t v);
 uint8_t *command_parsef(uint8_t *p, uint8_t *maxend
                         , const struct command_parser *cp, uint32_t *args);
-uint_fast8_t command_encodef(uint8_t *buf, const struct command_encoder *ce
-                             , va_list args);
-void command_add_frame(uint8_t *buf, uint_fast8_t msglen);
 uint_fast8_t command_encode_and_frame(
     uint8_t *buf, const struct command_encoder *ce, va_list args);
 void command_sendf(const struct command_encoder *ce, ...);