diff --git a/libs/libc/src/printf.cpp b/libs/libc/src/printf.cpp
index 13cdc1c4..e4bb9847 100644
--- a/libs/libc/src/printf.cpp
+++ b/libs/libc/src/printf.cpp
@@ -167,7 +167,7 @@ static int internal_printf(const char* format, PutString put_string_callback, ss
                 switch (current_char)
                 {
                 case 'c': {
-                    append_char(va_arg(ap, int));
+                    append_char((char)va_arg(ap, int));
                     break;
                 }
                 case '%': {
@@ -209,6 +209,7 @@ static int internal_printf(const char* format, PutString put_string_callback, ss
                     }
                     else { printf_unsigned_to_string(va_arg(ap, uint32_t), result, 10); }
                     append_string(result);
+                    break;
                 }
                 case 'x': {
                     char result[32];