diff --git a/src/buffer.cc b/src/buffer.cc
index 5d777dd1..98b01700 100644
--- a/src/buffer.cc
+++ b/src/buffer.cc
@@ -1,6 +1,8 @@
 #include "buffer.h"
 
+#include <cstdlib>
 #include <mutex>
+#include <thread>
 
 #include "platform.h"
 #include "../utils.h"
@@ -116,4 +118,4 @@ TEST_CASE("lock") {
   }
 }
 
-TEST_SUITE_END();
\ No newline at end of file
+TEST_SUITE_END();
diff --git a/src/platform_linux.cc b/src/platform_linux.cc
index 7439c928..8b556c08 100644
--- a/src/platform_linux.cc
+++ b/src/platform_linux.cc
@@ -1,7 +1,7 @@
 #if defined(__linux__) || defined(__APPLE__)
 #include "platform.h"
 
-#include "utils.h"
+#include "../utils.h"
 
 #include <cassert>
 #include <string>
@@ -64,17 +64,19 @@ int checked(int result, const char* expr) {
 
 struct PlatformSharedMemoryLinux : public PlatformSharedMemory {
   std::string name_;
+  size_t size_;
   int fd_;
 
-  PlatformSharedMemoryLinux(const std::string& name) : name_(name) {
-    std::cerr << "PlatformSharedMemoryLinux name=" << name << std::endl;
+  PlatformSharedMemoryLinux(const std::string& name, size_t size)
+    : name_(name), size_(size) {
+    std::cerr << "PlatformSharedMemoryLinux name=" << name << ", size=" << size << std::endl;
 
     // Try to create shared memory but only if it does not already exist. Since
     // we created the memory, we need to initialize it.
     fd_ = shm_open(name_.c_str(), O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
     if (fd_ >= 0) {
       std::cerr << "Calling ftruncate fd_=" << fd_ << std::endl;
-      CHECKED(ftruncate(fd_, shmem_size));
+      CHECKED(ftruncate(fd_, size));
     }
 
     // Otherwise, we just open existing shared memory. We don't need to
@@ -86,19 +88,20 @@ struct PlatformSharedMemoryLinux : public PlatformSharedMemory {
     }
 
     // Map the shared memory to an address.
-    shared =
-        CHECKED(mmap(nullptr /*kernel assigned starting address*/, shmem_size,
+    data =
+        CHECKED(mmap(nullptr /*kernel assigned starting address*/, size,
                      PROT_READ | PROT_WRITE, MAP_SHARED, fd_, 0 /*offset*/));
+    capacity = size;
 
     std::cout << "Open shared memory name=" << name << ", fd=" << fd_
-              << ", shared=" << shared << std::endl;
+              << ", shared=" << data << ", capacity=" << capacity << std::endl;
   }
 
   ~PlatformSharedMemoryLinux() override {
-    CHECKED(munmap(shared, shmem_size));
+    CHECKED(munmap(data, size_));
     CHECKED(shm_unlink(name_.c_str()));
 
-    shared = nullptr;
+    data = nullptr;
   }
 };
 
@@ -116,8 +119,8 @@ std::unique_ptr<PlatformScopedMutexLock> CreatePlatformScopedMutexLock(
 }
 
 std::unique_ptr<PlatformSharedMemory> CreatePlatformSharedMemory(
-    const std::string& name) {
+    const std::string& name, size_t size) {
   std::string name2 = "/" + name;
-  return MakeUnique<PlatformSharedMemoryLinux>(name2);
+  return MakeUnique<PlatformSharedMemoryLinux>(name2, size);
 }
-#endif
\ No newline at end of file
+#endif
diff --git a/src/resizable_buffer.h b/src/resizable_buffer.h
index f4aa40b0..23abde1d 100644
--- a/src/resizable_buffer.h
+++ b/src/resizable_buffer.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <cstddef>
+
 // Points to a generic block of memory that can be resized. This class owns
 // and has the only pointer to the underlying memory buffer.
 struct ResizableBuffer {
@@ -18,4 +20,4 @@ struct ResizableBuffer {
 
  private:
   size_t capacity_;
-};
\ No newline at end of file
+};