diff --git a/gfxinit.c b/gfxinit.c
index ffd1548555..beab3b08de 100644
--- a/gfxinit.c
+++ b/gfxinit.c
@@ -161,6 +161,12 @@ void CheckExternalFiles(void)
 	if (!FileMD5(sample_cat_win, false) && !FileMD5(sample_cat_dos, false))
 		fprintf(stderr, "Your sample.cat file is corrupted or missing!\n");
 
+	for (i = 0; i < lengthof(files_openttd); i++) {
+		if (!FileMD5(files_openttd[i], false)) {
+			fprintf(stderr, "Your %s file is corrupted or missing!\n", files_openttd[i].filename);
+		}
+	}
+
 	/*
 	 * forced DOS palette via command line -> leave it that way
 	 * all Windows files present -> Windows palette
diff --git a/table/files.h b/table/files.h
index 702f91c00d..2ec2cfe08b 100644
--- a/table/files.h
+++ b/table/files.h
@@ -53,3 +53,13 @@ static FileList files_win = {
 
 static MD5File sample_cat_win = { "SAMPLE.CAT", {0x92, 0x12, 0xe8, 0x1e, 0x72, 0xba, 0xdd, 0x4b, 0xbe, 0x1e, 0xae, 0xae, 0x66, 0x45, 0x8e, 0x10} };
 static MD5File sample_cat_dos = { "SAMPLE.CAT", {0x42, 0x2e, 0xa3, 0xdd, 0x07, 0x4d, 0x28, 0x59, 0xbb, 0x51, 0x63, 0x9a, 0x6e, 0x0e, 0x85, 0xda} };
+
+static MD5File files_openttd[] = {
+	{ "2ccmap.grf",    { 0x20, 0x03, 0x32, 0x1a, 0x43, 0x6c, 0xc1, 0x05, 0x80, 0xbd, 0x43, 0xeb, 0xe1, 0xfd, 0x0c, 0x62 } },
+	{ "airports.grf",  { 0xfd, 0xa4, 0x38, 0xd6, 0x9c, 0x81, 0x74, 0xfe, 0xa0, 0x98, 0xa2, 0x14, 0x4b, 0x15, 0xb8, 0x4b } },
+	{ "autorail.grf",  { 0xed, 0x44, 0x7f, 0xbb, 0x19, 0x44, 0x48, 0x4c, 0x07, 0x8a, 0xb1, 0xc1, 0x5c, 0x12, 0x3a, 0x60 } },
+	{ "canalsw.grf",   { 0x13, 0x9c, 0x98, 0xcf, 0xb8, 0x7c, 0xd7, 0x1f, 0xca, 0x34, 0xa5, 0x6b, 0x65, 0x31, 0xec, 0x0f } },
+	{ "elrailsw.grf",  { 0x4f, 0xf9, 0xac, 0x79, 0x50, 0x28, 0x9b, 0xe2, 0x15, 0x30, 0xa8, 0x1e, 0xd5, 0xfd, 0xe1, 0xda } },
+	{ "openttd.grf",   { 0x3c, 0x9f, 0x90, 0xb1, 0xf2, 0x45, 0xc3, 0xb4, 0xb5, 0xbb, 0xed, 0x30, 0xec, 0x07, 0x95, 0x9e } },
+	{ "trkfoundw.grf", { 0x12, 0x33, 0x3f, 0xa3, 0xd1, 0x86, 0x8b, 0x04, 0x53, 0x18, 0x9c, 0xee, 0xf9, 0x2d, 0xf5, 0x95 } },
+};