diff --git a/build.rs b/build.rs
index f5e2676..ccc8471 100644
--- a/build.rs
+++ b/build.rs
@@ -24,7 +24,7 @@ fn main() {
     let dst = autotools::Config::new(LIB_GC_DIR)
         .cflag(format!(
             // spell-checker: disable-next-line
-            "-I{} -L/lib/x86_64-linux-gnu -lpthread -fPIC -DPOINTER_MASK=0xffffffffffffffff",
+            "-I{} -L/lib/x86_64-linux-gnu -lpthread -fPIC",
             dst.join("include").display()
         ))
         .build();