diff --git a/CMakeLists.txt b/CMakeLists.txt
index d51cf463..015545be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@ ExternalProject_Add(googletest
 
 ExternalProject_Add(heap_layers
         GIT_REPOSITORY    https://github.com/emeryberger/Heap-Layers.git
-        GIT_TAG           a80041cc15174ab82a39bae1cd750b52955c7eef
+        GIT_TAG           b0b2c2c7c5553b79c534f55317a5ab3e7d011379
         SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/heap_layers-src"
         BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/heap_layers-build"
         CONFIGURE_COMMAND ""
diff --git a/WORKSPACE b/WORKSPACE
index 6eea4954..5a4568af 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -10,7 +10,7 @@ commit = {
     "rules_cc": "aa7ff810cf5ec99ca34f784743b33631b74c2d16",
     "googletest": "aa533abfd4232b01f9e57041d70114d5a77e6de0",
     "benchmark": "bc5651e54a7e178ca6b1e27e469a9be19cfa62c4", # 1.5.4
-    "heap_layers": "08ca96cfe11b1dd1c504fb7be613ad00756d568f",
+    "heap_layers": "b0b2c2c7c5553b79c534f55317a5ab3e7d011379",
 }
 
 http_archive(
diff --git a/src/fbsd_wrapper.cc b/src/fbsd_wrapper.cc
index f784630c..2e29cfd4 100644
--- a/src/fbsd_wrapper.cc
+++ b/src/fbsd_wrapper.cc
@@ -58,7 +58,7 @@ WEAK_REDEF1(void, free, void *);
 WEAK_REDEF1(void, cfree, void *);
 WEAK_REDEF2(void *, calloc, size_t, size_t);
 WEAK_REDEF2(void *, realloc, void *, size_t);
-WEAK_REDEF2(void *, reallocarray, void *, size_t, size_t);
+WEAK_REDEF3(void *, reallocarray, void *, size_t, size_t);
 WEAK_REDEF2(void *, memalign, size_t, size_t);
 WEAK_REDEF3(int, posix_memalign, void **, size_t, size_t);
 WEAK_REDEF2(void *, aligned_alloc, size_t, size_t);
diff --git a/src/testing/unit/alignment.cc b/src/testing/unit/alignment.cc
index ade55a18..0533116e 100644
--- a/src/testing/unit/alignment.cc
+++ b/src/testing/unit/alignment.cc
@@ -46,8 +46,8 @@ TEST(Alignment, NaturalAlignment) {
 TEST(Alignment, NonOverlapping) {
   auto heap = ThreadLocalHeap::GetHeap();
 
-  const uintptr_t a = reinterpret_cast<uintptr_t>(heap->malloc(-8));
-  const uintptr_t b = reinterpret_cast<uintptr_t>(heap->malloc(-8));
+  const auto a = heap->malloc(-8);
+  const auto b = heap->malloc(-8);
 
   // we should return nullptr for crazy allocations like this.
   // Fixes #62
diff --git a/src/testing/unit/concurrent_mesh_test.cc b/src/testing/unit/concurrent_mesh_test.cc
index 58c8e04e..7f868b19 100644
--- a/src/testing/unit/concurrent_mesh_test.cc
+++ b/src/testing/unit/concurrent_mesh_test.cc
@@ -32,7 +32,7 @@ static atomic<int> ShouldContinueTest;
 // stop-the-world quiescent period for the copy/mremap phase of
 // meshing -- copied from libmesh.cc
 
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__FreeBSD__)
 #define PTHREAD_CREATE_THROW
 #else
 #define PTHREAD_CREATE_THROW throw()
diff --git a/src/testing/unit/triple_mesh_test.cc b/src/testing/unit/triple_mesh_test.cc
index 774ab915..c70bacd1 100644
--- a/src/testing/unit/triple_mesh_test.cc
+++ b/src/testing/unit/triple_mesh_test.cc
@@ -31,7 +31,7 @@ static atomic<int> ShouldContinueTest1;
 static atomic<int> ShouldExit2;
 static atomic<int> ShouldContinueTest2;
 
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(__FreeBSD__)
 #define PTHREAD_CREATE_THROW
 #else
 #define PTHREAD_CREATE_THROW throw()