Index: src/OFSerialization.m
==================================================================
--- src/OFSerialization.m
+++ src/OFSerialization.m
@@ -16,10 +16,12 @@
 
 #include "config.h"
 
 #if defined(OF_APPLE_RUNTIME) || defined(OF_GNU_RUNTIME)
 # import <objc/runtime.h>
+#elif defined(OF_OLD_GNU_RUNTIME)
+# import <objc/objc-api.h>
 #endif
 
 #import "OFSerialization.h"
 #import "OFString.h"
 #import "OFArray.h"

Index: tests/OFStringTests.m
==================================================================
--- tests/OFStringTests.m
+++ tests/OFStringTests.m
@@ -345,11 +345,11 @@
 	EXPECT_EXCEPTION(@"Detect invalid characters in -[decimalValue] #1",
 	    OFInvalidFormatException, [@"abc" decimalValue])
 	EXPECT_EXCEPTION(@"Detect invalid characters in -[decimalValue] #2",
 	    OFInvalidFormatException, [@"0a" decimalValue])
 	EXPECT_EXCEPTION(@"Detect invalid characters in -[decimalValue] #3",
-			 OFInvalidFormatException, [@"0 1" decimalValue])
+	    OFInvalidFormatException, [@"0 1" decimalValue])
 
 	EXPECT_EXCEPTION(@"Detect invalid chars in -[hexadecimalValue] #1",
 	    OFInvalidFormatException, [@"0xABCDEFG" hexadecimalValue])
 	EXPECT_EXCEPTION(@"Detect invalid chars in -[hexadecimalValue] #2",
 	    OFInvalidFormatException, [@"0x" hexadecimalValue])