diff --git a/src/game_config.cc b/src/game_config.cc
index dde349d..7063ec7 100644
--- a/src/game_config.cc
+++ b/src/game_config.cc
@@ -125,10 +125,26 @@ bool gameConfigInit(bool isMapper, int argc, char** argv)
     char* ch = strrchr(executable, '\\');
     if (ch != NULL) {
         *ch = '\0';
-        snprintf(gGameConfigFilePath, sizeof(gGameConfigFilePath), "%s\\%s", executable, GAME_CONFIG_FILE_NAME);
+        if (isMapper) {
+            snprintf(gGameConfigFilePath,
+                sizeof(gGameConfigFilePath),
+                "%s\\%s",
+                executable,
+                MAPPER_CONFIG_FILE_NAME);
+        } else {
+            snprintf(gGameConfigFilePath,
+                sizeof(gGameConfigFilePath),
+                "%s\\%s",
+                executable,
+                GAME_CONFIG_FILE_NAME);
+        }
         *ch = '\\';
     } else {
-        strcpy(gGameConfigFilePath, GAME_CONFIG_FILE_NAME);
+        if (isMapper) {
+            strcpy(gGameConfigFilePath, MAPPER_CONFIG_FILE_NAME);
+        } else {
+            strcpy(gGameConfigFilePath, GAME_CONFIG_FILE_NAME);
+        }
     }
 
     // Read contents of `fallout2.cfg` into config. The values from the file
diff --git a/src/game_config.h b/src/game_config.h
index a444762..78a1299 100644
--- a/src/game_config.h
+++ b/src/game_config.h
@@ -5,8 +5,8 @@
 
 namespace fallout {
 
-// The file name of the main config file.
 #define GAME_CONFIG_FILE_NAME "fallout2.cfg"
+#define MAPPER_CONFIG_FILE_NAME "mapper2.cfg"
 
 #define GAME_CONFIG_SYSTEM_KEY "system"
 #define GAME_CONFIG_PREFERENCES_KEY "preferences"