diff --git a/GNUmakefile b/GNUmakefile
index 3ab5b7a..2cf7a96 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -33,6 +33,10 @@ libobjc_C_FILES = \
 	sendmsg2.c\
 	statics_loader.c
 
+ifneq ($(enable_legacy), no)
+libobjc_C_FILES += legacy_malloc.c
+endif
+
 libobjc_HEADER_FILES_DIR = objc
 libobjc_HEADER_FILES_INSTALL_DIR = objc
 ifneq ($(install_headers), no)