diff --git a/science/misc/gnuplot/pspec.xml b/science/misc/gnuplot/pspec.xml
index 791a2eb47b..6eb2541950 100644
--- a/science/misc/gnuplot/pspec.xml
+++ b/science/misc/gnuplot/pspec.xml
@@ -42,8 +42,10 @@
             <Dependency>emacs</Dependency>
             <Dependency>cairo</Dependency>
             <Dependency>pango</Dependency>
+            <Dependency>glib2</Dependency>
             <Dependency>wxGTK</Dependency>
             <Dependency>libcerf</Dependency>
+            <Dependency>libX11</Dependency>
             <Dependency>qt5-svg</Dependency>
             <Dependency>qt5-base</Dependency>
             <Dependency>readline</Dependency>