diff --git a/poi-ooxml/src/main/java/org/apache/poi/xslf/usermodel/XSLFGraphicFrame.java b/poi-ooxml/src/main/java/org/apache/poi/xslf/usermodel/XSLFGraphicFrame.java
index e85e9608ec..d853d0bb2c 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xslf/usermodel/XSLFGraphicFrame.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xslf/usermodel/XSLFGraphicFrame.java
@@ -51,6 +51,7 @@ import org.openxmlformats.schemas.presentationml.x2006.main.CTGroupShape;
 @Beta
 public class XSLFGraphicFrame extends XSLFShape implements GraphicalFrame<XSLFShape, XSLFTextParagraph> {
     private static final String DRAWINGML_CHART_URI = "http://schemas.openxmlformats.org/drawingml/2006/chart";
+    private static final String DRAWINGML_DIAGRAM_URI = "http://schemas.openxmlformats.org/drawingml/2006/diagram";
     private static final Logger LOG = LogManager.getLogger(XSLFGraphicFrame.class);
 
     /*package*/ XSLFGraphicFrame(CTGraphicalObjectFrame shape, XSLFSheet sheet){
@@ -169,6 +170,14 @@ public class XSLFGraphicFrame extends XSLFShape implements GraphicalFrame<XSLFSh
         return uri.equals(DRAWINGML_CHART_URI);
     }
 
+    /**
+     * @since POI 5.2.0
+     */
+    public boolean hasDiagram() {
+        String uri = getGraphicalData().getUri();
+        return uri.equals(DRAWINGML_DIAGRAM_URI);
+    }
+
     private CTGraphicalObjectData getGraphicalData() {
         return ((CTGraphicalObjectFrame)getXmlObject()).getGraphic().getGraphicData();
     }
@@ -200,7 +209,7 @@ public class XSLFGraphicFrame extends XSLFShape implements GraphicalFrame<XSLFSh
 
         CTGraphicalObjectData data = getGraphicalData();
         String uri = data.getUri();
-        if(uri.equals("http://schemas.openxmlformats.org/drawingml/2006/diagram")){
+        if(uri.equals(DRAWINGML_DIAGRAM_URI)){
             copyDiagram(data, (XSLFGraphicFrame)sh);
         } if(uri.equals(DRAWINGML_CHART_URI)){
             copyChart(data, (XSLFGraphicFrame)sh);
@@ -235,9 +244,9 @@ public class XSLFGraphicFrame extends XSLFShape implements GraphicalFrame<XSLFSh
 
     // TODO should be moved to a sub-class
     private void copyDiagram(CTGraphicalObjectData objData, XSLFGraphicFrame srcShape){
-        String xpath = "declare namespace dgm='http://schemas.openxmlformats.org/drawingml/2006/diagram' $this//dgm:relIds";
+        String xpath = "declare namespace dgm='" + DRAWINGML_DIAGRAM_URI + "' $this//dgm:relIds";
         XmlObject[] obj = objData.selectPath(xpath);
-        if(obj != null && obj.length == 1){
+        if(obj != null && obj.length == 1) {
             XmlCursor c = obj[0].newCursor();
 
             XSLFSheet sheet = srcShape.getSheet();
diff --git a/poi-ooxml/src/test/java/org/apache/poi/xslf/usermodel/TestXSLFGraphicFrame.java b/poi-ooxml/src/test/java/org/apache/poi/xslf/usermodel/TestXSLFGraphicFrame.java
new file mode 100644
index 0000000000..e58b528b13
--- /dev/null
+++ b/poi-ooxml/src/test/java/org/apache/poi/xslf/usermodel/TestXSLFGraphicFrame.java
@@ -0,0 +1,36 @@
+/* ====================================================================
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+==================================================================== */
+package org.apache.poi.xslf.usermodel;
+
+import org.junit.jupiter.api.Test;
+import java.io.IOException;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.apache.poi.xslf.XSLFTestDataSamples.openSampleDocument;
+
+class TestXSLFGraphicFrame {
+
+    @Test
+    void testHasDiagram() throws IOException {
+        try (XMLSlideShow ppt = openSampleDocument("SmartArt.pptx")) {
+            XSLFSlide slide = ppt.getSlides().get(0);
+            XSLFGraphicFrame gf = (XSLFGraphicFrame) slide.getShapes().get(0);
+
+            assertTrue(gf.hasDiagram());
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/resources/devtools/forbidden-signatures-prod.txt b/src/resources/devtools/forbidden-signatures-prod.txt
index fa1a846088..c2b02a219c 100644
--- a/src/resources/devtools/forbidden-signatures-prod.txt
+++ b/src/resources/devtools/forbidden-signatures-prod.txt
@@ -27,6 +27,6 @@
 
 
 java.lang.System#gc() @ Please do not try to stop the world
-java.lang.Throwable#printStackTrace() @ Please use POILogger for exceptions
-java.lang.Throwable#printStackTrace(java.io.PrintStream) @ Please use POILogger for exceptions
-java.lang.Throwable#printStackTrace(java.io.PrintWriter) @ Please use POILogger for exceptions
\ No newline at end of file
+java.lang.Throwable#printStackTrace() @ Please use Log4J 2.x for exceptions
+java.lang.Throwable#printStackTrace(java.io.PrintStream) @ Please use Log4J 2.x for exceptions
+java.lang.Throwable#printStackTrace(java.io.PrintWriter) @ Please use Log4J 2.x for exceptions
\ No newline at end of file
diff --git a/test-data/slideshow/SmartArt.pptx b/test-data/slideshow/SmartArt.pptx
new file mode 100644
index 0000000000..7b7731d78f
Binary files /dev/null and b/test-data/slideshow/SmartArt.pptx differ