diff --git a/src/rt/rust_obstack.cpp b/src/rt/rust_obstack.cpp
index 81d0076a37cc..fc11eed86f4b 100644
--- a/src/rt/rust_obstack.cpp
+++ b/src/rt/rust_obstack.cpp
@@ -17,6 +17,9 @@
 #undef max
 #endif
 
+#undef DPRINT
+#define DPRINT(fmt, ...)
+
 //const size_t DEFAULT_CHUNK_SIZE = 4096;
 const size_t DEFAULT_CHUNK_SIZE = 500000;
 const size_t DEFAULT_ALIGNMENT = 16;
@@ -88,8 +91,6 @@ rust_obstack::alloc(size_t len, type_desc *tydesc) {
     if (!chunk)
         return alloc_new(len, tydesc);
 
-    DPRINT("alloc sz %u\n", (uint32_t)len);
-
     void *ptr = chunk->alloc(len, tydesc);
     ptr = ptr ? ptr : alloc_new(len, tydesc);
 
@@ -101,8 +102,6 @@ rust_obstack::free(void *ptr) {
     if (!ptr)
         return;
 
-    DPRINT("free ptr %p\n", ptr);
-
     assert(chunk);
     while (!chunk->free(ptr)) {
         DPRINT("deleting chunk at %p\n", chunk);