diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index 5e74adc..5275026 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -7015,7 +7015,7 @@
 		 (double)(MIN(height, SIGN_HEIGHT))) < 1.15)
 	    {
 		/* Change the aspect ratio by at most 15% to fill the
-		 * available space completly. */
+		 * available space completely. */
 		height = (double)SIGN_HEIGHT * SIGN_ASPECT / aspect;
 		height = MIN(height, SIGN_HEIGHT);
 	    }