diff --git a/companion/src/helpers.cpp b/companion/src/helpers.cpp
index 339e064ca..d56cbd7a8 100644
--- a/companion/src/helpers.cpp
+++ b/companion/src/helpers.cpp
@@ -175,7 +175,7 @@ void GVarGroup::valuesChanged()
     else if (sb)
       weight = sb->value();
     else
-      weight = dsb->value()/step;
+      weight = round(dsb->value()/step);
   }
 }
 
diff --git a/companion/targets/windows/winbuild.h b/companion/targets/windows/winbuild.h
index b940cbd50..d00370ed9 100644
--- a/companion/targets/windows/winbuild.h
+++ b/companion/targets/windows/winbuild.h
@@ -21,9 +21,13 @@
 #define FORCEINLINE inline
 #define NOINLINE
 
-#define round(x)    floor(x+0.5)
 #define strcasecmp  _stricmp
 #define strncasecmp _tcsnicmp
 #define snprintf    _snprintf
 
+inline double round(double number)
+{
+  return number < 0.0 ? ceil(number - 0.5) : floor(number + 0.5);
+}
+
 #endif