diff --git a/config/GM8E01_48/symbols.txt b/config/GM8E01_48/symbols.txt
index 3ace7e6f..e533284f 100644
--- a/config/GM8E01_48/symbols.txt
+++ b/config/GM8E01_48/symbols.txt
@@ -16054,7 +16054,7 @@ __StringWrite = .text:0x8038E080; // type:function size:0x6C scope:global
 __FileWrite = .text:0x8038E0EC; // type:function size:0x58 scope:global
 __pformatter = .text:0x8038E144; // type:function size:0x774 scope:local
 float2str = .text:0x8038E8B8; // type:function size:0x6EC scope:local
-fn_8038EFA4 = .text:0x8038EFA4; // type:function size:0x12C
+round_decimal = .text:0x8038EFA4; // type:function size:0x12C
 double2hex = .text:0x8038F0D0; // type:function size:0x338 scope:local
 longlong2str = .text:0x8038F408; // type:function size:0x2DC scope:local
 long2str = .text:0x8038F6E4; // type:function size:0x220 scope:local
diff --git a/configure.py b/configure.py
index cf112634..f9042cdf 100755
--- a/configure.py
+++ b/configure.py
@@ -1250,7 +1250,7 @@ config.libs = [
             Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/mem.c"),
             Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/mem_funcs.c"),
             Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/misc_io.c"),
-            Object(NonMatching, "Runtime/printf.c"),
+            Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/printf.c"),
             Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/qsort.c"),
             Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/rand.c"),
             Object(MatchingFor("GM8E01_00", "GM8E01_01", "GM8E01_48"), "Runtime/sscanf.c"),
diff --git a/libc/ansi_files.h b/libc/ansi_files.h
index 60a39ece..aab7f1f2 100644
--- a/libc/ansi_files.h
+++ b/libc/ansi_files.h
@@ -23,6 +23,12 @@ int __flush_buffer(FILE* file, size_t* length);
 void __prep_buffer(FILE* file);
 int __flush_all();
 
+extern FILE __files[4];
+
+#define stdin  &(__files[0])
+#define stdout &(__files[1])
+#define stderr &(__files[2])
+
 #ifdef __cplusplus
 };
 #endif // ifdef __cplusplus
diff --git a/libc/string.h b/libc/string.h
index 59b88938..c79840f8 100644
--- a/libc/string.h
+++ b/libc/string.h
@@ -19,6 +19,7 @@ char* strncpy(char* dest, const char* src, size_t num);
 int strcmp(const char* s1, const char* s2);
 int strncmp(const char* s1, const char* s2, size_t n);
 char* strncat(char* dest, const char* src, size_t n);
+char* strchr(const char* str, int chr);
 
 #ifdef __cplusplus
 }