diff --git a/src/plugins/cmakeprojectmanager/configmodel.cpp b/src/plugins/cmakeprojectmanager/configmodel.cpp
index 190ffbc9120..4815e2f0bd1 100644
--- a/src/plugins/cmakeprojectmanager/configmodel.cpp
+++ b/src/plugins/cmakeprojectmanager/configmodel.cpp
@@ -623,6 +623,9 @@ QString ConfigModelTreeItem::toolTip() const
                                                    "<p>Not in CMakeCache.txt</p>");
         }
     }
+    tooltip << QCoreApplication::translate("CMakeProjectManager",
+                                           "<p>Type: <b>%1</b></p>")
+                   .arg(dataItem->typeDisplay());
     return tooltip.join("");
 }
 
diff --git a/src/plugins/cmakeprojectmanager/configmodel.h b/src/plugins/cmakeprojectmanager/configmodel.h
index 83e34d191b5..11e4153b076 100644
--- a/src/plugins/cmakeprojectmanager/configmodel.h
+++ b/src/plugins/cmakeprojectmanager/configmodel.h
@@ -85,6 +85,22 @@ public:
             }
         }
 
+        QString typeDisplay() const {
+            switch (type) {
+                case DataItem::BOOLEAN:
+                    return "BOOL";
+                case DataItem::FILE:
+                    return "FILEPATH";
+                case DataItem::DIRECTORY:
+                    return "PATH";
+                case DataItem::STRING:
+                    return "STRING";
+                case DataItem::UNKNOWN:
+                    break;
+            }
+            return "UNINITIALIZED";
+        }
+
         CMakeConfigItem toCMakeConfigItem() const {
             CMakeConfigItem cmi;
             cmi.key = key.toUtf8();