diff --git a/include/tdisp/tdisp.h b/include/tdisp/tdisp.h
index 7bf5f69f..88c560ce 100644
--- a/include/tdisp/tdisp.h
+++ b/include/tdisp/tdisp.h
@@ -93,13 +93,13 @@ void tdispHome(void);
 void tdispGotoXY(coord_t col, coord_t row);
 
 /**
- * @brief	Store a custom character in the displays RAM
+ * @brief	Store a custom character in RAM
  *
  * @note	This usually must be done after each power-up since most
  *			LCDs lose their RAM content.
  *
  * @param[in] location		On which address to store the character (from 0 up to max)
- * @param[in] char			The character to be stored. This is an array.
+ * @param[in] charmap		The character to be stored.
  */
 void tdispCreateChar(uint8_t location, char *charmap);
 
diff --git a/src/tdisp/tdisp.c b/src/tdisp/tdisp.c
index f10b09ee..22de001f 100644
--- a/src/tdisp/tdisp.c
+++ b/src/tdisp/tdisp.c
@@ -105,10 +105,8 @@ void tdispDrawChar(char c) {
 }
 
 void tdispDrawString(char *s) {
-	char c;
-
-	while(c = *s++)
-		tdispDrawChar(c);	
+	while(*s)
+		tdispDrawChar(*s++);
 }
 
 void tdispDrawCharLocation(coord_t col, coord_t row, char c) {