diff --git a/desktop/kde/edu/kstars/files/kstars-isnan.patch b/desktop/kde/edu/kstars/files/kstars-isnan.patch
new file mode 100644
index 0000000000..ad02baec46
--- /dev/null
+++ b/desktop/kde/edu/kstars/files/kstars-isnan.patch
@@ -0,0 +1,46 @@
+From: Christian Dersch <lupinix@mailbox.org>
+Date: Wed, 03 Feb 2016 10:19:55 +0000
+Subject: Fix compilation with gcc 6.x (namespace std has to be used explicitly in some cases, e.g. when ambiguous)
+X-Git-Tag: v16.03.80
+X-Git-Url: http://quickgit.kde.org/?p=kstars.git&a=commitdiff&h=7d34e52f4dd6e15b871596b3c64d4c7cdba599b4
+---
+Fix compilation with gcc 6.x (namespace std has to be used explicitly in some cases, e.g. when ambiguous)
+REVIEW:126976
+---
+
+
+--- a/kstars/fitsviewer/fitsdata.cpp
++++ b/kstars/fitsviewer/fitsdata.cpp
+@@ -548,7 +548,7 @@
+     int diff_x=s1->x - s2->x;
+     int diff_y=s1->y - s2->y;
+ 
+-    dis = abs( sqrt( diff_x*diff_x + diff_y*diff_y));
++    dis = std::abs( sqrt( diff_x*diff_x + diff_y*diff_y));
+     dis -= s1->width/2;
+     dis -= s2->width/2;
+ 
+
+--- a/kstars/tools/horizonmanager.cpp
++++ b/kstars/tools/horizonmanager.cpp
+@@ -192,7 +192,7 @@
+         az  = dms::fromString(regionItem->child(i, 1)->data(Qt::DisplayRole).toString(), true);
+         alt = dms::fromString(regionItem->child(i, 2)->data(Qt::DisplayRole).toString(), true);
+ 
+-        if (isnan(az.Degrees()) || isnan(alt.Degrees()))
++        if (std::isnan(az.Degrees()) || std::isnan(alt.Degrees()))
+             return false;
+ 
+         p.setAz(az);
+@@ -534,9 +534,9 @@
+         dms azAngle  = dms::fromString(parent->child(item->row(),1)->data(Qt::DisplayRole).toString(), true);
+         dms altAngle = dms::fromString(parent->child(item->row(),2)->data(Qt::DisplayRole).toString(), true);
+ 
+-        if (isnan(azAngle.Degrees()))
++        if (std::isnan(azAngle.Degrees()))
+             azOK = false;
+-        if (isnan(altAngle.Degrees()))
++        if (std::isnan(altAngle.Degrees()))
+             altOK = false;
+ 
+         if ( (item->column() == 1 && azOK == false) || (item->column() == 2 && altOK == false) )
\ No newline at end of file
diff --git a/desktop/kde/edu/kstars/pspec.xml b/desktop/kde/edu/kstars/pspec.xml
index 74a5af462c..65dc5960ec 100644
--- a/desktop/kde/edu/kstars/pspec.xml
+++ b/desktop/kde/edu/kstars/pspec.xml
@@ -51,6 +51,9 @@
             <Dependency>zlib-devel</Dependency>            
             <Dependency>extra-cmake-modules</Dependency>
         </BuildDependencies>
+        <Patches>
+            <Patch level="1">kstars-isnan.patch</Patch>
+        </Patches>
     </Source>
 
     <Package>
@@ -76,6 +79,7 @@
             <Dependency>kwidgetsaddons</Dependency>
            <Dependency>wcslib</Dependency>
            <Dependency>xplanet</Dependency>
+           <Dependency>knotifications</Dependency>
         </RuntimeDependencies>
         <Files>
             <Path fileType="config">/etc/xdg</Path>
@@ -88,7 +92,7 @@
 
     <History>
         <Update release="1">
-            <Date>2016-03-24</Date>
+            <Date>2016-04-01</Date>
             <Version>15.12.3</Version>
             <Comment>First release</Comment>
             <Name>Yusuf Aydemir</Name>