diff --git a/lib/libc/malloc/CMakeLists.txt b/lib/libc/malloc/CMakeLists.txt
index a040db7..a01a54f 100644
--- a/lib/libc/malloc/CMakeLists.txt
+++ b/lib/libc/malloc/CMakeLists.txt
@@ -30,4 +30,5 @@ sysroot_add_library(
 	HEADER_DIR /usr/include
 	LIB_DIR /usr/lib)
 
+target_compile_definitions(libc-malloc PRIVATE ENABLE_GLOBAL_HEAP=1)
 target_link_libraries(libc-malloc libc-core libmango)