diff --git a/memmap.cpp b/memmap.cpp
index 6e2534ee..c9927c43 100644
--- a/memmap.cpp
+++ b/memmap.cpp
@@ -4257,38 +4257,6 @@ void CMemory::CheckForAnyPatch (const char *rom_filename, bool8 header, int32 &r
 	}
 
 #ifdef UNZIP_SUPPORT
-	// Mercurial Magic (MSU-1 distribution pack)
-	if (strcasecmp(ext, "msu1") && strcasecmp(ext, ".msu1"))
-	{
-		_makepath(fname, drive, dir, name, "msu1");
-		unzFile msu1file = unzOpen(fname);
-
-		if (!msu1file)
-		{
-			_snprintf(fname, sizeof(fname), "%s" SLASH_STR "%s%s",
-				S9xGetDirectory(IPS_DIR), name, ".msu1");
-			msu1file = unzOpen(fname);
-		}
-
-		if (msu1file)
-		{
-			int	port = unzFindExtension(msu1file, "bps");
-			if (port == UNZ_OK)
-			{
-				printf(" in %s", fname);
-
-				Stream *s = new unzStream(msu1file);
-				ret = ReadBPSPatch(s, offset, rom_size);
-				s->closeStream();
-
-				if (ret)
-					printf("!\n");
-				else
-					printf(" failed!\n");
-			}
-		}
-	}
-
 	if (!strcasecmp(ext, "zip") || !strcasecmp(ext, ".zip"))
 	{
 		unzFile	file = unzOpen(rom_filename);
@@ -4783,4 +4751,38 @@ void CMemory::CheckForAnyPatch (const char *rom_filename, bool8 header, int32 &r
 		if (flag)
 			return;
 	}
+
+#ifdef UNZIP_SUPPORT
+	// Mercurial Magic (MSU-1 distribution pack)
+	if (strcasecmp(ext, "msu1") && strcasecmp(ext, ".msu1"))
+	{
+		_makepath(fname, drive, dir, name, "msu1");
+		unzFile msu1file = unzOpen(fname);
+
+		if (!msu1file)
+		{
+			_snprintf(fname, sizeof(fname), "%s" SLASH_STR "%s%s",
+				S9xGetDirectory(IPS_DIR), name, ".msu1");
+			msu1file = unzOpen(fname);
+		}
+
+		if (msu1file)
+		{
+			int	port = unzFindExtension(msu1file, "bps");
+			if (port == UNZ_OK)
+			{
+				printf(" in %s", fname);
+
+				Stream *s = new unzStream(msu1file);
+				ret = ReadBPSPatch(s, offset, rom_size);
+				s->closeStream();
+
+				if (ret)
+					printf("!\n");
+				else
+					printf(" failed!\n");
+			}
+		}
+	}
+#endif
 }
diff --git a/msu1.cpp b/msu1.cpp
index 802d9697..9e8c8901 100644
--- a/msu1.cpp
+++ b/msu1.cpp
@@ -248,18 +248,12 @@ STREAM S9xMSU1OpenFile(char *msu_ext)
         printf("Using msu file %s.\n", filename);
 
 #ifdef UNZIP_SUPPORT
-    // look for msu file in .msu1 (Mercurial Magic pack) or .msu.zip if not found in rom dir
+    // look for msu1 pack file in the rom or patch dir if msu data file not found in rom dir
     if (!file)
     {
-        const char *zip_filename = S9xGetFilename(".msu.zip", ROMFILENAME_DIR);
+        const char *zip_filename = S9xGetFilename(".msu1", ROMFILENAME_DIR);
 		unzFile	unzFile = unzOpen(zip_filename);
 
-		if (!unzFile)
-		{
-			zip_filename = S9xGetFilename(".msu1", ROMFILENAME_DIR);
-			unzFile = unzOpen(zip_filename);
-		}
-
 		if (!unzFile)
 		{
 			zip_filename = S9xGetFilename(".msu1", IPS_DIR);