diff --git a/biostools/analyzers.py b/biostools/analyzers.py
index 4e54fb3..690a7e8 100644
--- a/biostools/analyzers.py
+++ b/biostools/analyzers.py
@@ -352,7 +352,7 @@ class AMIAnalyzer(Analyzer):
 		# "Ref. " (Everex EISA 386-BIOS) - let the code handle termination
 		self._precolor_string_pattern = re.compile(b'''\\xFE([\\x00-\\x95\\x97-\\xFD\\xFF]{4}\\x96(?:[\\x00-\\x95\\x97-\\xFF]{4}\\x96)?[\\x00-\\x95\\x97-\\xFF]{6}|\\x6D\\xD4\\xCC\\x8E\\xFE[\\x00-\\xFF]{1,64})''')
 		self._precolor_signon_pattern = re.compile(b'''BIOS \\(C\\).*(?:AMI|American Megatrends Inc), for ([\\x0D\\x0A\\x20-\\x7E]+)''')
-		self._precolor_type_pattern = re.compile(b'''([0-9]86[a-z]*|8(?:08)?8)-BIOS \\(C\\)''')
+		self._precolor_type_pattern = re.compile(b'''([0-9]86[A-Za-z]*|8(?:08)?8)-BIOS \\(C\\)''')
 		self._precolor_setup_pattern = re.compile(b'''[A-Za-z][0-9/]+([^\\(]*(SETUP PROGRAM FOR | SETUP UTILITY)[^\\(]*)\\(C\\)19''')
 		self._precolor_pcchips_pattern = re.compile(b'''ADVANCED SYSTEM SETUP UTILITY VERSION[\\x20-\\x7E]+?PC CHIPS INC''')
 		# Decoded: "\(C\)AMI, \(([^\)]{11,64})\)" (the 64 is arbitrary)