diff --git a/src/system/libroot/posix/malloc_debug/guarded_heap.cpp b/src/system/libroot/posix/malloc_debug/guarded_heap.cpp
index f8d2c7c27a..728ae2373a 100644
--- a/src/system/libroot/posix/malloc_debug/guarded_heap.cpp
+++ b/src/system/libroot/posix/malloc_debug/guarded_heap.cpp
@@ -38,7 +38,7 @@ static int32 sStackEndTLSIndex = -1;
 using namespace std;
 static size_t sDefaultAlignment = alignof(max_align_t);
 #else
-static size_t sDefaultAlignment = 0;
+static size_t sDefaultAlignment = 8;
 #endif
 
 
diff --git a/src/system/libroot/posix/malloc_debug/heap.cpp b/src/system/libroot/posix/malloc_debug/heap.cpp
index 096fd699b2..3c9ed49218 100644
--- a/src/system/libroot/posix/malloc_debug/heap.cpp
+++ b/src/system/libroot/posix/malloc_debug/heap.cpp
@@ -54,7 +54,7 @@ static bool sUseGuardPage = false;
 using namespace std;
 static size_t sDefaultAlignment = alignof(max_align_t);
 #else
-static size_t sDefaultAlignment = 0;
+static size_t sDefaultAlignment = 8;
 #endif