diff --git a/libc/bionic/malloc_debug_qemu.cpp b/libc/bionic/malloc_debug_qemu.cpp
index fa40b35..b01cef2 100644
--- a/libc/bionic/malloc_debug_qemu.cpp
+++ b/libc/bionic/malloc_debug_qemu.cpp
@@ -612,7 +612,7 @@
         error_log("Unable to open /dev/qemu_trace");
         return false;
     } else {
-        qtrace = mmap(NULL, PAGESIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+        qtrace = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
         close(fd);
 
         if (qtrace == MAP_FAILED) {