Index: src/OFINISection.m
==================================================================
--- src/OFINISection.m
+++ src/OFINISection.m
@@ -108,11 +108,11 @@
 {
 	if (self != [OFINISection class])
 		return;
 
 	needsEscapeCharacterSet = [[OFCharacterSet alloc]
-	    initWithCharactersInString: @"\r\n\f\"\\="];
+	    initWithCharactersInString: @"\r\n\f\"\\=;#"];
 }
 
 - (instancetype)of_initWithName: (OFString *)name OF_DIRECT
 {
 	self = [super init];

Index: tests/OFINIFileTests.m
==================================================================
--- tests/OFINIFileTests.m
+++ tests/OFINIFileTests.m
@@ -117,10 +117,11 @@
 	    @"[tests]\r\n"
 	    @"foo=baz\r\n"
 	    @"foobar=baz\r\n"
 	    @";comment\r\n"
 	    @"new=new\r\n"
+	    @"\"#quoted\"=\";comment\"\r\n"
 	    @"\r\n"
 	    @"[foobar]\r\n"
 	    @"#foobarcomment\r\n"
 	    @"qux=\" asd\"\r\n"
 	    @"quxquxqux=\"hello\\\"wörld\"\r\n"
@@ -143,10 +144,11 @@
 	OFIRI *writeIRI;
 #endif
 
 	[tests setStringValue: @"baz" forKey: @"foo"];
 	[tests setStringValue: @"new" forKey: @"new"];
+	[tests setStringValue: @";comment" forKey: @"#quoted"];
 	[foobar setStringValue: @"a\fb" forKey: @"qux3"];
 	[types setLongLongValue: 0x10 forKey: @"integer"];
 	[types setBoolValue: false forKey: @"bool"];
 	[types setFloatValue: 0.25f forKey: @"float"];
 	[types setDoubleValue: 0.75 forKey: @"double"];