diff --git a/server/gameserver/glmhelper.cc b/server/gameserver/glmhelper.cc
index 33d72cbc..70e29f41 100644
--- a/server/gameserver/glmhelper.cc
+++ b/server/gameserver/glmhelper.cc
@@ -96,3 +96,8 @@ glm::vec3 GlmHelper::Vec2ToVec3(const glm::vec2& v2)
 {
     return glm::vec3(v2.x, 0.0f, v2.y);
 }
+
+bool GlmHelper::IsValidVec3(const glm::vec3& v)
+{
+    return !(isnan(v.x));
+}
diff --git a/server/gameserver/glmhelper.h b/server/gameserver/glmhelper.h
index a56e1c5d..3a914695 100644
--- a/server/gameserver/glmhelper.h
+++ b/server/gameserver/glmhelper.h
@@ -14,6 +14,7 @@ class GlmHelper
     static float Norm(const glm::vec3& v);
     static float Norm2D(const glm::vec3& v);
     static bool IsZero(const glm::vec3& v);
+    static bool IsValidVec3(const glm::vec3& v);
 
     static bool IsEqual2D(const glm::vec3& v1, const glm::vec3& v2);
     static bool IsEqual3D(const glm::vec3& v1, const glm::vec3& v2);