1 files changed, 3 insertions, 1 deletions

diff --git a/src/controller/callbacks/mouse.c b/src/controller/callbacks/mouse.c
index f594c23..f901476 100644
--- a/src/controller/callbacks/mouse.c
+++ b/src/controller/callbacks/mouse.c
@@ -26,7 +26,9 @@ mouse (int button, int state, int x, int y)
       // Deactive a panning event if one was happening.
       S.pan.active = false;
 
-      if (S.selection.active && S.selection.purpose == ZOOM)
+      if (S.selection.active && 
+          S.selection.purpose == ZOOM &&
+          glutGetModifiers () == GLUT_ACTIVE_CTRL)
         {
           /*
            * NOOP if the mouse was not moved.