diff --git a/include/osmocom/core/sercomm.h b/include/osmocom/core/sercomm.h
index 3d986c6..0583390 100644
--- a/include/osmocom/core/sercomm.h
+++ b/include/osmocom/core/sercomm.h
@@ -3,13 +3,6 @@
 
 #include <osmocom/core/msgb.h>
 
-#define HDLC_FLAG	0x7E
-#define HDLC_ESCAPE	0x7D
-
-#define HDLC_C_UI	0x03
-#define HDLC_C_P_BIT	(1 << 4)
-#define HDLC_C_F_BIT	(1 << 4)
-
 /* a low sercomm_dlci means high priority.  A high DLCI means low priority */
 enum sercomm_dlci {
 	SC_DLCI_HIGHEST = 0,
diff --git a/src/sercomm.c b/src/sercomm.c
index dbe3d05..75e7968 100644
--- a/src/sercomm.c
+++ b/src/sercomm.c
@@ -58,6 +58,13 @@
 
 #endif
 
+#define HDLC_FLAG	0x7E
+#define HDLC_ESCAPE	0x7D
+
+#define HDLC_C_UI	0x03
+#define HDLC_C_P_BIT	(1 << 4)
+#define HDLC_C_F_BIT	(1 << 4)
+
 enum rx_state {
 	RX_ST_WAIT_START,
 	RX_ST_ADDR,