diff --git a/src/commands.mm b/src/commands.mm
index bdd1bbb..d4a1e27 100644
--- a/src/commands.mm
+++ b/src/commands.mm
@@ -236,7 +236,7 @@ execute(
 				@try {
 					val = (int)[c longLongValueWithBase:0];
 				} @catch (OFInvalidFormatException *e) {
-					conoutf(@"unknown command: %s", c);
+					conoutf(@"unknown command: %@", c);
 				}
 			} else {
 				if ([identifier
diff --git a/src/console.mm b/src/console.mm
index 2a95cfa..bedb218 100644
--- a/src/console.mm
+++ b/src/console.mm
@@ -191,14 +191,15 @@ keypress(int code, bool isdown, int cooked)
 				break;
 
 			case SDLK_BACKSPACE:
-			case SDLK_LEFT: {
-				[commandbuf
-				    deleteCharactersInRange:
-				        OFMakeRange(commandbuf.length - 1, 1)];
+			case SDLK_LEFT:
+				if (commandbuf.length > 0)
+					[commandbuf
+					    deleteCharactersInRange:
+					        OFMakeRange(
+					            commandbuf.length - 1, 1)];
 
 				resetcomplete();
 				break;
-			}
 
 			case SDLK_UP:
 				if (histpos)