diff --git a/NEWS b/NEWS
index dcb92ff0..c38c904a 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,7 @@ procps-ng-NEXT
   * watch: define HOST_NAME_MAX where not defined          Debian #830734
   * library: dont use vm_min_free on non Linux             Debian #831396
   * library: dont use SIGPWR on FreeBSD                    Debian #832148
+  * pmap: fix duplicate output line under '-x' option      Redhat #1374061
 
 procps-ng-3.3.12
 ----------------
diff --git a/pmap.c b/pmap.c
index 61aca2c3..41116edc 100644
--- a/pmap.c
+++ b/pmap.c
@@ -597,25 +597,23 @@ static int one_proc(proc_t * p)
 		/* hex values are lower case or numeric, keys are upper */
 		if (mapbuf[0] >= 'A' && mapbuf[0] <= 'Z') {
 			/* Its a key */
-			if (sscanf
-			    (mapbuf, "%20[^:]: %llu", smap_key,
-			     &smap_value) == 2) {
-				if (strncmp("Rss", smap_key, 3) == 0) {
+			if (sscanf(mapbuf, "%20[^:]: %llu", smap_key, &smap_value) == 2) {
+				if (strcmp("Rss", smap_key) == 0) {
 					rss = smap_value;
 					total_rss += smap_value;
 					continue;
 				}
-				if (strncmp("Shared_Dirty", smap_key, 12) == 0) {
+				if (strcmp("Shared_Dirty", smap_key) == 0) {
 					shared_dirty = smap_value;
 					total_shared_dirty += smap_value;
 					continue;
 				}
-				if (strncmp("Private_Dirty", smap_key, 13) == 0) {
+				if (strcmp("Private_Dirty", smap_key) == 0) {
 					private_dirty = smap_value;
 					total_private_dirty += smap_value;
 					continue;
 				}
-				if (strncmp("Swap", smap_key, 4) == 0) {
+				if (strcmp("Swap", smap_key) == 0) {
 					/*doesn't matter as long as last */
 					printf("%0*" KLF "x %*lu %*llu %*llu %*s %s\n",
 					       maxw1, start,