2 files changed, 1 insertions, 5 deletions
diff --git a/src/alloc/alloc_mmap/mmap_mem.cpp b/src/alloc/alloc_mmap/mmap_mem.cpp
index 17c189e9b..b90b6d5f7 100644
--- a/src/alloc/alloc_mmap/mmap_mem.cpp
+++ b/src/alloc/alloc_mmap/mmap_mem.cpp
@@ -123,7 +123,7 @@ void* MemoryMapping_Allocator::alloc_block(size_t n)
 */
 void MemoryMapping_Allocator::dealloc_block(void* ptr, size_t n)
    {
-   if(ptr == 0)
+   if(ptr == nullptr)
       return;
 
    const byte PATTERNS[] = { 0x00, 0xF5, 0x5A, 0xAF, 0x00 };
diff --git a/src/alloc/alloc_mmap/mmap_mem.h b/src/alloc/alloc_mmap/mmap_mem.h
index fa4e5e715..c9983ed23 100644
--- a/src/alloc/alloc_mmap/mmap_mem.h
+++ b/src/alloc/alloc_mmap/mmap_mem.h
@@ -21,10 +21,6 @@ namespace Botan {
 class MemoryMapping_Allocator : public Pooling_Allocator
    {
    public:
-      /**
-      * @param mutex used for internal locking
-      */
-      MemoryMapping_Allocator(Mutex* mutex) : Pooling_Allocator(mutex) {}
       std::string type() const { return "mmap"; }
    private:
       void* alloc_block(size_t);