diff --git a/soc/intel/intel_adsp/common/ipc.c b/soc/intel/intel_adsp/common/ipc.c
index a33c03ebfde3ac..04503ca35e8f2d 100644
--- a/soc/intel/intel_adsp/common/ipc.c
+++ b/soc/intel/intel_adsp/common/ipc.c
@@ -100,6 +100,8 @@ int intel_adsp_ipc_init(const struct device *dev)
 
 	memset(devdata, 0, sizeof(*devdata));
 
+	k_sem_init(&devdata->sem, 0, 1);
+
 	/* ACK any latched interrupts (including TDA to clear IDA on
 	 * the other side!), then enable.
 	 */