--- src/gplt_x11.c
+++ src/gplt_x11.c	2012-03-15 11:17:24.000000000 +0000
@@ -2912,22 +2912,22 @@ exec_cmd(plot_struct *plot, char *comman
 
 		    case PseudoColor:
 			fprintf(stderr, ERROR_NOTICE("PseudoColor"));
-			fprintf(stderr, display_error_text_after);
+			fprintf(stderr, "%s", display_error_text_after);
 			break;
 
 		    case GrayScale:
 			fprintf(stderr, ERROR_NOTICE("GrayScale"));
-			fprintf(stderr, display_error_text_after);
+			fprintf(stderr, "%s", display_error_text_after);
 			break;
 
 		    case StaticColor:
 			fprintf(stderr, ERROR_NOTICE("StaticColor"));
-			fprintf(stderr, display_error_text_after);
+			fprintf(stderr, "%s", display_error_text_after);
 			break;
 
 		    case StaticGray:
 			fprintf(stderr, ERROR_NOTICE("StaticGray"));
-			fprintf(stderr, display_error_text_after);
+			fprintf(stderr, "%s", display_error_text_after);
 			break;
 
 		    case DirectColor: