diff --git a/aom_mem/aom_mem.c b/aom_mem/aom_mem.c
index 144085f..4514fb5 100644
--- a/aom_mem/aom_mem.c
+++ b/aom_mem/aom_mem.c
@@ -42,7 +42,7 @@
   const size_t aligned_size = GetAlignedMallocSize(size, align);
   void *const addr = malloc(aligned_size);
   if (addr) {
-    x = align_addr((unsigned char *)addr + ADDRESS_STORAGE_SIZE, (int)align);
+    x = align_addr((unsigned char *)addr + ADDRESS_STORAGE_SIZE, align);
     SetActualMallocAddress(x, addr);
   }
   return x;
diff --git a/aom_mem/include/aom_mem_intrnl.h b/aom_mem/include/aom_mem_intrnl.h
index 2e96fa4..3cdfbe0 100644
--- a/aom_mem/include/aom_mem_intrnl.h
+++ b/aom_mem/include/aom_mem_intrnl.h
@@ -27,6 +27,6 @@
 
 /*returns an addr aligned to the byte boundary specified by align*/
 #define align_addr(addr, align) \
-  (void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align))
+  (void *)(((size_t)(addr) + ((align)-1)) & ~(size_t)((align)-1))
 
 #endif  // AOM_MEM_INCLUDE_AOM_MEM_INTRNL_H_