diff --git a/glm/gtx/intersect.inl b/glm/gtx/intersect.inl
index 0c1cc935..ac99351d 100644
--- a/glm/gtx/intersect.inl
+++ b/glm/gtx/intersect.inl
@@ -49,7 +49,7 @@ namespace glm
 		typename genType::value_type a = glm::dot(e1, p);
 
 		typename genType::value_type Epsilon = std::numeric_limits<typename genType::value_type>::epsilon();
-		if(a < Epsilon)
+		if(a < Epsilon && a > -Epsilon)
 			return false;
 
 		typename genType::value_type f = typename genType::value_type(1.0f) / a;