diff --git a/multimedia/graphics/libpng/pspec.xml b/multimedia/graphics/libpng/pspec.xml
index 65f7cdaf..fdf2e085 100644
--- a/multimedia/graphics/libpng/pspec.xml
+++ b/multimedia/graphics/libpng/pspec.xml
@@ -38,6 +38,7 @@
         <Summary>Development files for libpng</Summary>
         <RuntimeDependencies>
             <Dependency release="current">libpng</Dependency>
+            <Dependency>zlib-devel</Dependency>
         </RuntimeDependencies>
         <Files>
             <Path fileType="executable">/usr/bin</Path>