1 files changed, 4 insertions, 0 deletions
diff --git a/src/sgr.c b/src/sgr.c
index 9faa117..4017b72 100644
--- a/src/sgr.c
+++ b/src/sgr.c
@@ -26,6 +26,9 @@
 
 #include <png.h>
 
+#include "i18n.h"
+#include "output.h"
+
 static png_color _4bit[] = {
 	{  0,   0,   0},  /* Black */
 	{170,   0,   0},  /* Red */
@@ -87,6 +90,7 @@ sgr(unsigned char *param, png_colorp fg, png_colorp bg)
 			}
 			p = param + 1;
 		} else if (*param < '0' || *param > '9') {
+			error(_("Invalid SGR parameter \"%s\""), p);
 			break;
 		}
 	}