diff --git a/desktop/kde6/applications/cantor-kf6/pspec.xml b/desktop/kde6/applications/cantor-kf6/pspec.xml
index 97e50dc224..daad67b27b 100755
--- a/desktop/kde6/applications/cantor-kf6/pspec.xml
+++ b/desktop/kde6/applications/cantor-kf6/pspec.xml
@@ -77,6 +77,7 @@
             <Dependency>syntax-highlighting-devel</Dependency>
             <Dependency>poppler-qt5-devel</Dependency>
             <Dependency>karchive-devel</Dependency>
+            <Dependency>ffmpeg4-devel</Dependency>
         </BuildDependencies>
     </Source>
 
@@ -134,6 +135,7 @@
             <Dependency>kconfigwidgets</Dependency>
             <Dependency>kwidgetsaddons</Dependency>
             <Dependency>poppler-qt5</Dependency>
+            <Dependency>ffmpeg4</Dependency>
             <Dependency versionFrom="5.15.2">qt5-svg</Dependency>
             <Dependency versionFrom="5.15.2">qt5-base</Dependency>
             <Dependency versionFrom="5.15.2">qt5-xmlpatterns</Dependency>
diff --git a/desktop/kde6/applications/marble-kf6/pspec.xml b/desktop/kde6/applications/marble-kf6/pspec.xml
index b176fef83f..140c8575bd 100755
--- a/desktop/kde6/applications/marble-kf6/pspec.xml
+++ b/desktop/kde6/applications/marble-kf6/pspec.xml
@@ -73,6 +73,7 @@
             <Dependency>qt5-serialport-devel</Dependency>
             <Dependency>protobuf-devel</Dependency>
             <Dependency>qt5-webchannel-devel</Dependency>
+            <Dependency>ffmpeg4-devel</Dependency>
         </BuildDependencies>
     </Source>
 
@@ -122,6 +123,7 @@
             <Dependency versionFrom="5.15.2">qt5-location</Dependency>
             <Dependency>kconfigwidgets</Dependency>
             <Dependency>kwidgetsaddons</Dependency>
+            <Dependency>ffmpeg4</Dependency>
             <Dependency versionFrom="5.15.2">qt5-declarative</Dependency>
             <Dependency versionFrom="5.15.2">qt5-serialport</Dependency>
         </RuntimeDependencies>