diff --git a/src/Implementation/FramebufferState.h b/src/Implementation/FramebufferState.h
index 4d213425c..df7464cff 100644
--- a/src/Implementation/FramebufferState.h
+++ b/src/Implementation/FramebufferState.h
@@ -30,7 +30,7 @@
 namespace Magnum { namespace Implementation {
 
 struct FramebufferState {
-    inline FramebufferState(): readBinding(0), drawBinding(0), renderbufferBinding(0) {}
+    inline constexpr FramebufferState(): readBinding(0), drawBinding(0), renderbufferBinding(0) {}
 
     GLuint readBinding, drawBinding, renderbufferBinding;
     Rectanglei viewport;
diff --git a/src/Implementation/MeshState.h b/src/Implementation/MeshState.h
index b2a18d756..b12b1c5ae 100644
--- a/src/Implementation/MeshState.h
+++ b/src/Implementation/MeshState.h
@@ -29,7 +29,7 @@
 namespace Magnum { namespace Implementation {
 
 struct MeshState {
-    inline MeshState(): currentVAO(0) {}
+    inline constexpr MeshState(): currentVAO(0) {}
 
     GLuint currentVAO;
 };