diff --git a/poi-scratchpad/src/main/java9/module-info.java b/poi-scratchpad/src/main/java9/module-info.java
index ea505f6c1c..10e92f26aa 100644
--- a/poi-scratchpad/src/main/java9/module-info.java
+++ b/poi-scratchpad/src/main/java9/module-info.java
@@ -21,6 +21,7 @@ module org.apache.poi.scratchpad {
     requires commons.math3;
     requires org.apache.commons.io;
     requires org.apache.commons.codec;
+    requires org.apache.commons.collections4;
     requires org.apache.logging.log4j;
 
     uses org.apache.poi.sl.usermodel.MetroShapeProvider;
diff --git a/poi-scratchpad/src/test/java9/module-info.java b/poi-scratchpad/src/test/java9/module-info.java
index 35dbc01a3e..748a2244a7 100644
--- a/poi-scratchpad/src/test/java9/module-info.java
+++ b/poi-scratchpad/src/test/java9/module-info.java
@@ -21,6 +21,7 @@ module org.apache.poi.scratchpad {
     requires commons.math3;
     requires org.apache.commons.io;
     requires org.apache.commons.codec;
+    requires org.apache.commons.collections4;
     requires org.apache.logging.log4j;
 
     uses org.apache.poi.sl.usermodel.MetroShapeProvider;