diff --git a/AUTHORS b/AUTHORS
index 5730ab5db..b83f244a5 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -78,6 +78,7 @@ The following submitted code, packages or analysis, and deserve special thanks:
   Erik Wenzel
   Štěpán Henek
   Fidel Mato
+  Justin Forest
 
 Thanks to the following, who submitted detailed bug reports and excellent
 suggestions:
diff --git a/ChangeLog b/ChangeLog
index 49913ccb4..d52bbff2e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -19,6 +19,8 @@ Features
    to Jake Bell).
  + Added Feature #1099, which supports the 'color.uda.<uda-name>' color rule
    (thanks to Florian Hollerweger).
+ + Added feature #1147, applying patch to display duration of each activity
+   session (thanks to Justin Forest).
  + The 'projects' command now outputs abstract parents and reduces
    repetition by not printing parent names in front of children names.
  + Added framework for testing bash autocompletion.
diff --git a/src/commands/CmdInfo.cpp b/src/commands/CmdInfo.cpp
index 3e3a0b43a..eef6cf3eb 100644
--- a/src/commands/CmdInfo.cpp
+++ b/src/commands/CmdInfo.cpp
@@ -381,7 +381,8 @@ int CmdInfo::execute (std::string& output)
       std::string previous;
       std::string current;
       unsigned int i = 0;
-      long total_time = 0, last_timestamp = 0;
+      long total_time = 0;
+      long last_timestamp = 0;
       while (i < undo.size ())
       {
         when = undo[i++];
diff --git a/src/es-ES.h b/src/es-ES.h
index 88ed3824d..28f97552e 100644
--- a/src/es-ES.h
+++ b/src/es-ES.h
@@ -727,6 +727,7 @@
 #define STRING_FEEDBACK_ATT_SET      "{1} se establecerá como '{2}'."
 #define STRING_FEEDBACK_ATT_MOD      "{1} se cambiará de '{2}' a '{3}'."
 #define STRING_FEEDBACK_ATT_DEL      "{1} eliminado."
+#define STRING_FEEDBACK_ATT_DEL_DUR  "{1} eliminado (duración: {2})."
 #define STRING_FEEDBACK_ATT_WAS_SET  "{1} establecido como '{2}'."
 #define STRING_FEEDBACK_ATT_WAS_MOD  "{1} cambiado de '{2}' a '{3}'."
 #define STRING_FEEDBACK_ANN_ADD      "Anotación de '{1}' añadida."
diff --git a/src/feedback.cpp b/src/feedback.cpp
index e28bcefbf..c5dff6c08 100644
--- a/src/feedback.cpp
+++ b/src/feedback.cpp
@@ -206,9 +206,10 @@ std::string taskInfoDifferences (const Task& before, const Task& after, const st
       out << format (STRING_FEEDBACK_ANN_DEL, before.get (*name))
           << "\n";
     }
-    else if (*name == "start") {
+    else if (*name == "start")
+    {
       out << format (STRING_FEEDBACK_ATT_DEL_DUR, ucFirst (*name),
-          Duration(current_timestamp - last_timestamp).formatPrecise())
+                     Duration(current_timestamp - last_timestamp).formatPrecise())
           << "\n";
     }
     else
@@ -239,6 +240,7 @@ std::string taskInfoDifferences (const Task& before, const Task& after, const st
     {
       if (*name == "start")
           last_timestamp = current_timestamp;
+
       out << format (STRING_FEEDBACK_ATT_WAS_SET,
                      ucFirst (*name),
                      renderAttribute (*name, after.get (*name), dateformat))