diff --git a/src/hardware/ipdbg-la/protocol.c b/src/hardware/ipdbg-la/protocol.c
index 0ba2d6d6..69c461ff 100644
--- a/src/hardware/ipdbg-la/protocol.c
+++ b/src/hardware/ipdbg-la/protocol.c
@@ -68,7 +68,7 @@
 /* LA subfunction command opcodes */
 #define CMD_LA_DELAY               0x1F
 
-SR_PRIV int data_available(struct ipdbg_la_tcp *tcp)
+SR_PRIV gboolean data_available(struct ipdbg_la_tcp *tcp)
 {
 #ifdef __WIN32__
 	ioctlsocket(tcp->socket, FIONREAD, &bytes_available);
@@ -77,10 +77,10 @@ SR_PRIV int data_available(struct ipdbg_la_tcp *tcp)
 
 	if (ioctl(tcp->socket, FIONREAD, &status) < 0) {	// TIOCMGET
 		sr_err("FIONREAD failed: %s\n", g_strerror(errno));
-		return 0;
+		return FALSE;
 	}
 
-	return (status < 1) ? 0 : 1;
+	return (status < 1) ? FALSE : TRUE;
 #endif  // __WIN32__
 }
 
diff --git a/src/hardware/ipdbg-la/protocol.h b/src/hardware/ipdbg-la/protocol.h
index 85f41a16..363d4462 100644
--- a/src/hardware/ipdbg-la/protocol.h
+++ b/src/hardware/ipdbg-la/protocol.h
@@ -54,7 +54,7 @@ struct dev_context {
 	uint8_t *raw_sample_buf;
 };
 
-int data_available(struct ipdbg_la_tcp *tcp);
+SR_PRIV gboolean data_available(struct ipdbg_la_tcp *tcp);
 
 SR_PRIV struct ipdbg_la_tcp *ipdbg_la_tcp_new(void);
 SR_PRIV void ipdbg_la_tcp_free(struct ipdbg_la_tcp *tcp);