diff --git a/mt7603_init.c b/mt7603_init.c
index 55da4a3e..7622cafc 100644
--- a/mt7603_init.c
+++ b/mt7603_init.c
@@ -212,6 +212,10 @@ mt7603_mac_init(struct mt7603_dev *dev)
 
 	mt76_rmw_field(dev, MT_AGG_PCR_RTS, MT_AGG_PCR_RTS_PKT_THR, 3);
 	mt76_set(dev, MT_TMAC_PCR, MT_TMAC_PCR_SPE_EN);
+
+	/* include preamble detection in CCA trigger signal */
+	mt76_rmw_field(dev, MT_TXREQ, MT_TXREQ_CCA_SRC_SEL, 2);
+
 	mt76_wr(dev, MT_RXREQ, 4);
 
 	/* Configure all rx packets to HIF */
diff --git a/mt7603_regs.h b/mt7603_regs.h
index 57979419..e59ec91c 100644
--- a/mt7603_regs.h
+++ b/mt7603_regs.h
@@ -328,6 +328,9 @@ enum {
 #define MT_TIMEOUT_VAL_PLCP		GENMASK(15, 0)
 #define MT_TIMEOUT_VAL_CCA		GENMASK(31, 16)
 
+#define MT_TXREQ			MT_WF_TMAC(0x09c)
+#define MT_TXREQ_CCA_SRC_SEL		GENMASK(31, 30)
+
 #define MT_RXREQ			MT_WF_TMAC(0x0a0)
 #define MT_RXREQ_DELAY			GENMASK(8, 0)