diff --git a/NEWS b/NEWS
index abc1992..0adda2e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,8 @@
+2.6.1 (2017/02/19):
+------------------
+* stop always showing activity (#12942)
+* fix sizing issues and GtkCssProvider lifecycle
+
 2.6.0 (2016/11/1):
 -----------------
 * set progressbar minimal width/height to 4px
diff --git a/panel-plugin/devperf.c b/panel-plugin/devperf.c
index 26e5ee8..175fd44 100644
--- a/panel-plugin/devperf.c
+++ b/panel-plugin/devperf.c
@@ -33,6 +33,9 @@
 #include <string.h>
 #include <errno.h>
 #include <sys/time.h>
+/* for major() and minor() */
+#define _BSD_SOURCE
+#include <sys/types.h>
 
 
 #if defined(__linux__)
@@ -59,8 +62,8 @@ static GetPerfData_t m_mGetPerfData = 0;
 static int DevGetPerfData1 (dev_t p_iDevice, struct devperf_t *p_poPerf)
 	/* Get disk performance statistics from STATISTICS_FILE_1 */
 {
-    const int       iMajorNo = (p_iDevice >> 8) & 0xFF, /**/
-	iMinorNo = p_iDevice & 0xFF;
+    const int       iMajorNo = major(p_iDevice),
+	iMinorNo = minor(p_iDevice);
     struct timeval  oTimeStamp;
     FILE           *pF;
     unsigned int    major, minor, rsect, wsect, ruse, wuse, use;