diff --git a/src/ipc/hsw-ipc.c b/src/ipc/hsw-ipc.c
index 8a48d854d..2b198b10a 100644
--- a/src/ipc/hsw-ipc.c
+++ b/src/ipc/hsw-ipc.c
@@ -87,11 +87,12 @@ out:
 
 static void irq_handler(void *arg)
 {
-	uint32_t isr;
+	uint32_t isr, imrd;
 	uint32_t msg = 0;
 
 	/* Interrupt arrived, check src */
 	isr = shim_read(SHIM_ISRD);
+	imrd = shim_read(SHIM_IMRD);
 
 	tracev_ipc("ipc: irq isr 0x%x", isr);
 
@@ -103,7 +104,7 @@ static void irq_handler(void *arg)
 		do_notify();
 	}
 
-	if (isr & SHIM_ISRD_BUSY) {
+	if (isr & SHIM_ISRD_BUSY && !(imrd & SHIM_IMRD_BUSY)) {
 
 		/* Mask Busy interrupt before return */
 		shim_write(SHIM_IMRD, shim_read(SHIM_IMRD) | SHIM_IMRD_BUSY);