diff --git a/repos/dde_linux/src/include/lx_emul/alloc.h b/repos/dde_linux/src/include/lx_emul/alloc.h
index 88daeb69f6..8f5fbbddf4 100644
--- a/repos/dde_linux/src/include/lx_emul/alloc.h
+++ b/repos/dde_linux/src/include/lx_emul/alloc.h
@@ -21,6 +21,7 @@ extern "C" {
 void * lx_emul_mem_alloc(unsigned long size);
 void * lx_emul_mem_alloc_uncached(unsigned long size);
 void * lx_emul_mem_alloc_aligned(unsigned long size, unsigned long align);
+void * lx_emul_mem_alloc_aligned_uncached(unsigned long size, unsigned long align);
 unsigned long lx_emul_mem_dma_addr(void * addr);
 void   lx_emul_mem_free(const void * ptr);
 unsigned long lx_emul_mem_size(const void * ptr);
diff --git a/repos/dde_linux/src/lib/lx_emul/alloc.cc b/repos/dde_linux/src/lib/lx_emul/alloc.cc
index 2c9a2c449b..4c11920b0c 100644
--- a/repos/dde_linux/src/lib/lx_emul/alloc.cc
+++ b/repos/dde_linux/src/lib/lx_emul/alloc.cc
@@ -43,6 +43,16 @@ extern "C" void * lx_emul_mem_alloc_uncached(unsigned long size)
 };
 
 
+extern "C" void * lx_emul_mem_alloc_aligned_uncached(unsigned long size,
+                                                     unsigned long align)
+{
+	/* always align memory objects to 32 bytes, like malloc, heap etc. */
+	void * const ptr = Lx_kit::env().uncached_memory.alloc(size, align);
+	lx_emul_forget_pages(ptr, size);
+	return ptr;
+};
+
+
 extern "C" unsigned long lx_emul_mem_dma_addr(void * addr)
 {
 	unsigned long ret = Lx_kit::env().memory.dma_addr(addr);
diff --git a/repos/dde_linux/src/lib/lx_emul/shadow/kernel/dma/mapping.c b/repos/dde_linux/src/lib/lx_emul/shadow/kernel/dma/mapping.c
index 90df148508..6caed93c10 100644
--- a/repos/dde_linux/src/lib/lx_emul/shadow/kernel/dma/mapping.c
+++ b/repos/dde_linux/src/lib/lx_emul/shadow/kernel/dma/mapping.c
@@ -29,7 +29,7 @@ void * dma_alloc_attrs(struct device * dev,
 		lx_emul_trace_and_stop(__func__);
 	}
 
-	addr = lx_emul_mem_alloc_uncached(size);
+	addr = lx_emul_mem_alloc_aligned_uncached(size, PAGE_SIZE);
 	*dma_handle = lx_emul_mem_dma_addr(addr);
 	return addr;
 }