diff --git a/tools/include/nolibc/errno.h b/tools/include/nolibc/errno.h
index bab83692ea1c..a2325596d550 100644
--- a/tools/include/nolibc/errno.h
+++ b/tools/include/nolibc/errno.h
@@ -15,8 +15,8 @@
 #ifndef NOLIBC_IGNORE_ERRNO
 #define SET_ERRNO(v) do { errno = (v); } while (0)
 int errno __attribute__((weak));
-char *program_invocation_name __attribute__((weak)) = "";
-char *program_invocation_short_name __attribute__((weak)) = "";
+char *program_invocation_name __attribute__((weak)) = (char *)"";
+char *program_invocation_short_name __attribute__((weak)) = (char *)"";
 #else
 #define SET_ERRNO(v) do { } while (0)
 #define program_invocation_name ""