diff --git a/src/Vector3.h b/src/Vector3.h
index 0a0968c59..c175bf135 100644
--- a/src/Vector3.h
+++ b/src/Vector3.h
@@ -316,7 +316,7 @@ protected:
 
 
 
-template <> Vector3<int> Vector3<int>::Floor(void) const
+template <> inline Vector3<int> Vector3<int>::Floor(void) const
 {
 	return *this;
 }