diff --git a/fileio.c b/fileio.c
index 4d2e800cc7..704b643302 100644
--- a/fileio.c
+++ b/fileio.c
@@ -103,7 +103,7 @@ void FioCloseAll(void)
 		FioCloseFile(i);
 }
 
-bool FiosCheckFileExists(const char *filename)
+bool FioCheckFileExists(const char *filename)
 {
 	FILE *f;
 	char buf[MAX_PATH];
diff --git a/fileio.h b/fileio.h
index 926c986bea..6ee58b32c3 100644
--- a/fileio.h
+++ b/fileio.h
@@ -14,6 +14,6 @@ FILE *FioFOpenFile(const char *filename);
 void FioOpenFile(int slot, const char *filename);
 void FioReadBlock(void *ptr, uint size);
 void FioSkipBytes(int n);
-bool FiosCheckFileExists(const char *filename);
+bool FioCheckFileExists(const char *filename);
 
 #endif /* FILEIO_H */
diff --git a/newgrf.c b/newgrf.c
index b1cd9a20c3..0cd835ac2f 100644
--- a/newgrf.c
+++ b/newgrf.c
@@ -2996,7 +2996,7 @@ void LoadNewGRF(uint load_index, uint file_index)
 		_cur_stage = stage;
 		_cur_spriteid = load_index;
 		for (c = _first_grfconfig; c != NULL; c = c->next) {
-			if (!FiosCheckFileExists(c->filename)) {
+			if (!FioCheckFileExists(c->filename)) {
 				// TODO: usrerror()
 				error("NewGRF file missing: %s", c->filename);
 			}