2 files changed, 3 insertions, 2 deletions
diff --git a/compat/shm.cpp b/compat/shm.cpp
index 1f863190..f59469dc 100644
--- a/compat/shm.cpp
+++ b/compat/shm.cpp
@@ -106,7 +106,7 @@ shm_wrapper::shm_wrapper(const char *shm_name, const char* /*mutex_name*/, int m
     strcat(filename, shm_name);
     fd = shm_open(filename, O_RDWR | O_CREAT, 0600);
     (void) ftruncate(fd, map_size);
-    mem = mmap(NULL, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, (off_t)0);
+    mem = mmap(nullptr, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, (off_t)0);
 }
 
 shm_wrapper::~shm_wrapper()
diff --git a/compat/shm.h b/compat/shm.h
index ece693ea..d1363219 100644
--- a/compat/shm.h
+++ b/compat/shm.h
@@ -28,7 +28,8 @@ class OTR_COMPAT_EXPORT shm_wrapper final
 #if defined(_WIN32)
     HANDLE mutex, mapped_file;
 #else
-    int fd, size;
+    int fd;
+    unsigned size;
 #endif
 
 public: