1 files changed, 3 insertions, 0 deletions
diff --git a/py/malloc.c b/py/malloc.c
index b0493d9341..f48cb8da4f 100644
--- a/py/malloc.c
+++ b/py/malloc.c
@@ -117,7 +117,10 @@ void *m_malloc0(size_t num_bytes) {
     if (ptr == NULL && num_bytes != 0) {
         return m_malloc_fail(num_bytes);
     }
+    // If this config is set then the GC clears all memory, so we don't need to.
+    #if !MICROPY_GC_CONSERVATIVE_CLEAR
     memset(ptr, 0, num_bytes);
+    #endif
     return ptr;
 }