diff --git a/libpsx/include/stdio.h b/libpsx/include/stdio.h
index 0e093d9..c63e585 100644
--- a/libpsx/include/stdio.h
+++ b/libpsx/include/stdio.h
@@ -123,6 +123,7 @@ void clearerr(FILE *stream);
 int feof(FILE *stream);
 int ferror(FILE *stream);
 int fileno(FILE *stream);
+void perror(const char *s);
 
 #define getc(f)		fgetc(f)
 
diff --git a/libpsx/src/libc/error.c b/libpsx/src/libc/error.c
index ab5fe5b..2cfd7e8 100644
--- a/libpsx/src/libc/error.c
+++ b/libpsx/src/libc/error.c
@@ -114,3 +114,8 @@ int strerror_r(int errnum, char *strerrbuf, size_t buflen)
 	snprintf(strerrbuf, buflen, "Unknown error %d", errnum);
 	return -1;
 }
+
+void perror(const char *s)
+{
+	fprintf(stderr, "%s: %s\n", s, strerror(errno));
+}