diff --git a/src/blackcore/data/authenticateduser.h b/src/blackcore/data/authenticateduser.h
index 704b98587..f2d187a4e 100644
--- a/src/blackcore/data/authenticateduser.h
+++ b/src/blackcore/data/authenticateduser.h
@@ -28,7 +28,7 @@ namespace BlackCore
             static const char *key() { return "dbuser"; }
 
             //! First load is synchronous
-            static bool isPinned() { return true; }
+            static constexpr bool isPinned() { return true; }
 
             //! Default value
             static const BlackMisc::Network::CAuthenticatedUser &defaultValue()
diff --git a/src/blackcore/data/globalsetup.h b/src/blackcore/data/globalsetup.h
index 3eb395b0f..fdae8f27f 100644
--- a/src/blackcore/data/globalsetup.h
+++ b/src/blackcore/data/globalsetup.h
@@ -196,7 +196,7 @@ namespace BlackCore
             static const char *key() { return "bootstrap"; }
 
             //! First load is synchronous
-            static bool isPinned() { return true; }
+            static constexpr bool isPinned() { return true; }
 
             //! Default value
             static const CGlobalSetup &defaultValue()
diff --git a/src/blackcore/data/updateinfo.h b/src/blackcore/data/updateinfo.h
index 60bda015a..de628cb20 100644
--- a/src/blackcore/data/updateinfo.h
+++ b/src/blackcore/data/updateinfo.h
@@ -125,7 +125,7 @@ namespace BlackCore
             static const char *key() { return "version"; }
 
             //! First load is synchronous
-            static bool isPinned() { return true; }
+            static constexpr bool isPinned() { return true; }
 
             //! Default value
             static const CUpdateInfo &defaultValue()
diff --git a/src/blackcore/data/vatsimsetup.h b/src/blackcore/data/vatsimsetup.h
index a11f9874f..c0bb65218 100644
--- a/src/blackcore/data/vatsimsetup.h
+++ b/src/blackcore/data/vatsimsetup.h
@@ -128,7 +128,7 @@ namespace BlackCore
             static const char *key() { return "vatsim"; }
 
             //! First load is synchronous
-            static bool isPinned() { return true; }
+            static constexpr bool isPinned() { return true; }
 
             //! Default value
             static const CVatsimSetup &defaultValue()
diff --git a/src/blackmisc/datacache.h b/src/blackmisc/datacache.h
index 4cbb1863a..a95afdd2a 100644
--- a/src/blackmisc/datacache.h
+++ b/src/blackmisc/datacache.h
@@ -332,7 +332,7 @@ namespace BlackMisc
 
         //! If true, then value will be synchronously loaded when CDataCache is constructed.
         //! Good for small, important values; bad for large ones.
-        static bool isPinned() { return false; }
+        static constexpr bool isPinned() { return false; }
 
         //! Deleted default constructor.
         CDataTrait() = delete;