diff --git a/glm/gtc/round.inl b/glm/gtc/round.inl
index 255dec66..94fdd54b 100644
--- a/glm/gtc/round.inl
+++ b/glm/gtc/round.inl
@@ -104,10 +104,7 @@ namespace detail
 		GLM_FUNC_QUALIFIER static genType call(genType Source, genType Multiple)
 		{
 			if(Source > genType(0))
-			{
-				genType Tmp = Source - genType(1);
-				return Tmp + (Multiple - std::fmod(Tmp, Multiple));
-			}
+				return Source + (Multiple - std::fmod(Source, Multiple));
 			else
 				return Source + std::fmod(-Source, Multiple);
 		}
@@ -152,10 +149,7 @@ namespace detail
 			if(Source >= genType(0))
 				return Source - std::fmod(Source, Multiple);
 			else
-			{
-				genType Tmp = Source + genType(1);
-				return Tmp - std::fmod(Tmp, Multiple) - Multiple;
-			}
+				return Source - std::fmod(Source, Multiple) - Multiple;
 		}
 	};