diff --git a/cheats2.cpp b/cheats2.cpp
index c58e2b6a..997d58c2 100644
--- a/cheats2.cpp
+++ b/cheats2.cpp
@@ -6,7 +6,6 @@
 
 #include "bml.h"
 #include "cheats.h"
-#include "fmt/format.h"
 #include "snes9x.h"
 #include "memmap.h"
 
@@ -522,10 +521,14 @@ int S9xModifyCheatGroup(uint32 num, const std::string &name, const std::string &
 
 std::string S9xCheatToText(const SCheat &c)
 {
-    if (c.conditional)
-        return fmt::format("{:06x}={:02x}?{:02x}", c.address, c.cond_byte, c.byte);
+    char output[256]{};
 
-    return fmt::format("{:06x}={:02x}", c.address, c.byte);
+    if (c.conditional)
+        sprintf(output, "%06x=%02x?%02x", c.address, c.cond_byte, c.byte);
+    else
+        sprintf(output, "%06x=%02x", c.address, c.byte);
+
+    return std::string(output);
 }
 
 std::string S9xCheatGroupToText(SCheatGroup &g)
@@ -638,8 +641,9 @@ static bool8 S9xLoadCheatFileClassic(const std::string &filename)
         c.address = data[2] | (data[3] << 8) | (data[4] << 16);
 
         std::string name((const char *)&data[8], 20);
-        auto cheat = fmt::format("{:x}={:x}", c.address, c.byte);
-
+        char code[32]{};
+        sprintf(code, "%x=%x", c.address, c.byte);
+        std::string cheat(code);
         S9xAddCheatGroup(name, cheat);
 
         if (c.enabled)
@@ -691,14 +695,14 @@ bool8 S9xSaveCheatFile(const std::string &filename)
 
     for (i = 0; i < Cheat.group.size(); i++)
     {
-        fmt::print(file,
-                   "cheat\n"
-                   "  name: {}\n"
-                   "  code: {}\n"
-                   "{}\n",
-                   Cheat.group[i].name,
-                   S9xCheatGroupToText(i),
-                   Cheat.group[i].enabled ? "  enable\n" : "");
+        fprintf(file,
+                "cheat\n"
+                "  name: %s\n"
+                "  code: %s\n"
+                "%s\n",
+                Cheat.group[i].name.c_str(),
+                S9xCheatGroupToText(i).c_str(),
+                Cheat.group[i].enabled ? "  enable\n" : "");
     }
 
     fclose(file);
diff --git a/libretro/Makefile.common b/libretro/Makefile.common
index a751357c..ccb29c3f 100644
--- a/libretro/Makefile.common
+++ b/libretro/Makefile.common
@@ -60,5 +60,5 @@ SOURCES_CXX := $(CORE_DIR)/apu/apu.cpp \
 				 $(CORE_DIR)/sha256.cpp \
 				 $(CORE_DIR)/bml.cpp \
 				 $(CORE_DIR)/movie.cpp \
-				 $(CORE_DIR)/compat.cpp \
+				 $(CORE_DIR)/fscompat.cpp \
 				 $(CORE_DIR)/libretro/libretro.cpp
diff --git a/libretro/libretro.cpp b/libretro/libretro.cpp
index b9c8abd2..4f0767cc 100644
--- a/libretro/libretro.cpp
+++ b/libretro/libretro.cpp
@@ -16,6 +16,7 @@
 #include "crosshairs.h"
 #include <stdio.h>
 #include <vector>
+#include <string>
 
 #ifdef _WIN32
 #include <direct.h>
@@ -936,10 +937,10 @@ void retro_cheat_set(unsigned index, bool enabled, const char *codeline)
         }
 
         /* Goldfinger was broken and nobody noticed. Removed */
-        if (S9xAddCheatGroup ("retro", code) >= 0)
+        if (S9xAddCheatGroup (std::string("retro"), std::string(code)) >= 0)
         {
             if (enabled)
-                S9xEnableCheatGroup (Cheat.g.size () - 1);
+                S9xEnableCheatGroup (Cheat.group.size () - 1);
         }
         else
         {
@@ -1059,14 +1060,14 @@ static bool8 LoadBIOS(uint8 *biosrom, const char *biosname, int biossize)
     char	name[PATH_MAX + 1];
     bool8 r = FALSE;
 
-    strcpy(name, S9xGetDirectory(ROMFILENAME_DIR));
+    strcpy(name, S9xGetDirectory(ROMFILENAME_DIR).c_str());
     strcat(name, SLASH_STR);
     strcat(name, biosname);
 
     fp = fopen(name, "rb");
     if (!fp)
     {
-        strcpy(name, S9xGetDirectory(BIOS_DIR));
+        strcpy(name, S9xGetDirectory(BIOS_DIR).c_str());
         strcat(name, SLASH_STR);
         strcat(name, biosname);
 
@@ -2108,23 +2109,23 @@ const char* S9xGetFilename(const char* in, s9x_getdirtype type)
     return in;
 }
 
-const char* S9xGetDirectory(s9x_getdirtype type)
+std::string S9xGetDirectory(s9x_getdirtype type)
 {
     switch (type)
     {
         case BIOS_DIR:
-            return retro_system_directory;
+            return std::string(retro_system_directory);
         default:
-            return g_rom_dir;
+            return std::string(g_rom_dir);
     }
 
-    return "";
+    return std::string("");
 }
 void S9xInitInputDevices() {}
 void S9xHandlePortCommand(s9xcommand_t, short, short) {}
 bool S9xPollButton(unsigned int, bool*) { return false; }
 void S9xToggleSoundChannel(int) {}
-const char* S9xGetFilenameInc(const char* in, s9x_getdirtype) { return ""; }
+std::string S9xGetFilenameInc(std::string in, s9x_getdirtype) { return ""; }
 const char* S9xBasename(const char* in) { return in; }
 bool8 S9xInitUpdate() { return TRUE; }
 void S9xExtraUsage() {}