1 files changed, 1 insertions, 1 deletions
diff --git a/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFSimpleShape.java b/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFSimpleShape.java
index 79fbffe76a..bd29667c8c 100644
--- a/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFSimpleShape.java
+++ b/src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFSimpleShape.java
@@ -577,7 +577,7 @@ public abstract class XSLFSimpleShape extends XSLFShape implements SimpleShape {
             String name = spPr.getPrstGeom().getPrst().toString();
             geom = dict.get(name);
             if(geom == null) {
-                throw new IllegalStateException("Unknown shape geometry: " + name);
+                throw new IllegalStateException("Unknown shape geometry: " + name + ", available geometries are: " + dict.keySet());
             }
         } else if (spPr.isSetCustGeom()){
             XMLStreamReader staxReader = spPr.getCustGeom().newXMLStreamReader();