diff --git a/src/hardware/fluke-45/api.c b/src/hardware/fluke-45/api.c
index 16c7dc03..2e80b6bf 100644
--- a/src/hardware/fluke-45/api.c
+++ b/src/hardware/fluke-45/api.c
@@ -78,16 +78,20 @@ static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
 	sr_scpi_get_string(scpi, "ECHO-TEST", &response);
 	if (response && strcmp(response, "ECHO-TEST") == 0) {
 		sr_err("Serial port ECHO is ON. Please turn it OFF!");
+		g_free(response);
 		return NULL;
 	}
+	g_free(response);
 #endif
 
 	/* Get device IDN. */
 	if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
+		sr_scpi_hw_info_free(hw_info);
 		sr_info("Couldn't get IDN response, retrying.");
 		sr_scpi_close(scpi);
 		sr_scpi_open(scpi);
 		if (sr_scpi_get_hw_id(scpi, &hw_info) != SR_OK) {
+			sr_scpi_hw_info_free(hw_info);
 			sr_info("Couldn't get IDN response.");
 			return NULL;
 		}
diff --git a/src/hardware/fluke-45/protocol.c b/src/hardware/fluke-45/protocol.c
index 5d9c3793..16489007 100644
--- a/src/hardware/fluke-45/protocol.c
+++ b/src/hardware/fluke-45/protocol.c
@@ -332,6 +332,7 @@ SR_PRIV int fl45_scpi_get_response(const struct sr_dev_inst *sdi, char *cmd)
 		 * If the response is a prompt then ignore and read the next
 		 * response in the buffer.
 		 */
+		g_free(devc->response);
 		devc->response = NULL;
 		/* Now attempt to read again. */
 		if (sr_scpi_get_string(sdi->conn, NULL, &devc->response) != SR_OK)
@@ -339,9 +340,10 @@ SR_PRIV int fl45_scpi_get_response(const struct sr_dev_inst *sdi, char *cmd)
 	}
 
 	/* NULL RS232 error prompts. */
-	if (strcmp(devc->response, "!>") == 0
-	    || (strcmp(devc->response, "?>") == 0)) {
+	if (strcmp(devc->response, "!>") == 0 ||
+	    (strcmp(devc->response, "?>") == 0)) {
 		/* Unable to execute CMD. */
+		g_free(devc->response);
 		devc->response = NULL;
 	}