diff --git a/src/forge.c b/src/forge.c
index 3c656c4..e216055 100644
--- a/src/forge.c
+++ b/src/forge.c
@@ -289,6 +289,7 @@ static bool init(const Parameters *params) {
 
   window_startup(error_callback);
 
+  context.tex_resolution[0] = params->internal_size;
   context.tex_resolution[1] = params->internal_size;
 
   if (params->output) {