diff --git a/src/backend/backend.h b/src/backend/backend.h
index 03f04f7..5bf8015 100644
--- a/src/backend/backend.h
+++ b/src/backend/backend.h
@@ -235,6 +235,9 @@ namespace snmalloc
       }
       else
       {
+        static_assert(
+          GlobalMetaRange::ConcurrencySafe,
+          "Global meta data range needs to be concurrency safe.");
         typename GlobalMetaRange::State global_state;
         p = global_state->alloc_range(bits::next_pow2(size));
       }
diff --git a/src/backend/commitrange.h b/src/backend/commitrange.h
index a0032d6..43b1f88 100644
--- a/src/backend/commitrange.h
+++ b/src/backend/commitrange.h
@@ -25,6 +25,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = ParentRange::Aligned;
 
+    static constexpr bool ConcurrencySafe = ParentRange::ConcurrencySafe;
+
     constexpr CommitRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t size)
diff --git a/src/backend/empty_range.h b/src/backend/empty_range.h
index 5feabd9..36680f3 100644
--- a/src/backend/empty_range.h
+++ b/src/backend/empty_range.h
@@ -19,6 +19,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = true;
 
+    static constexpr bool ConcurrencySafe = true;
+
     constexpr EmptyRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t)
diff --git a/src/backend/globalrange.h b/src/backend/globalrange.h
index 7b4bb0b..d8ae667 100644
--- a/src/backend/globalrange.h
+++ b/src/backend/globalrange.h
@@ -37,6 +37,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = ParentRange::Aligned;
 
+    static constexpr bool ConcurrencySafe = true;
+
     constexpr GlobalRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t size)
diff --git a/src/backend/largebuddyrange.h b/src/backend/largebuddyrange.h
index 5b2954d..a4a807a 100644
--- a/src/backend/largebuddyrange.h
+++ b/src/backend/largebuddyrange.h
@@ -271,6 +271,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = true;
 
+    static constexpr bool ConcurrencySafe = false;
+
     constexpr LargeBuddyRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t size)
diff --git a/src/backend/pagemapregisterrange.h b/src/backend/pagemapregisterrange.h
index de55b13..4084eed 100644
--- a/src/backend/pagemapregisterrange.h
+++ b/src/backend/pagemapregisterrange.h
@@ -30,6 +30,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = ParentRange::Aligned;
 
+    static constexpr bool ConcurrencySafe = ParentRange::ConcurrencySafe;
+
     capptr::Chunk<void> alloc_range(size_t size)
     {
       auto base = state->alloc_range(size);
diff --git a/src/backend/palrange.h b/src/backend/palrange.h
index 82d36ce..5fa3fe6 100644
--- a/src/backend/palrange.h
+++ b/src/backend/palrange.h
@@ -24,6 +24,11 @@ namespace snmalloc
 
     static constexpr bool Aligned = pal_supports<AlignedAllocation, PAL>;
 
+    // Note we have always assumed the Pals to provide a concurrency safe
+    // API.  If in the future this changes, then this would
+    // need to be changed.
+    static constexpr bool ConcurrencySafe = true;
+
     constexpr PalRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t size)
diff --git a/src/backend/smallbuddyrange.h b/src/backend/smallbuddyrange.h
index b813b67..4ee0758 100644
--- a/src/backend/smallbuddyrange.h
+++ b/src/backend/smallbuddyrange.h
@@ -175,6 +175,8 @@ namespace snmalloc
     static constexpr bool Aligned = true;
     static_assert(ParentRange::Aligned, "ParentRange must be aligned");
 
+    static constexpr bool ConcurrencySafe = false;
+
     constexpr SmallBuddyRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t size)
diff --git a/src/backend/statsrange.h b/src/backend/statsrange.h
index 0a61fef..0693983 100644
--- a/src/backend/statsrange.h
+++ b/src/backend/statsrange.h
@@ -31,6 +31,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = ParentRange::Aligned;
 
+    static constexpr bool ConcurrencySafe = ParentRange::ConcurrencySafe;
+
     constexpr StatsRange() = default;
 
     capptr::Chunk<void> alloc_range(size_t size)
diff --git a/src/backend/subrange.h b/src/backend/subrange.h
index c83bdab..dd48243 100644
--- a/src/backend/subrange.h
+++ b/src/backend/subrange.h
@@ -31,6 +31,8 @@ namespace snmalloc
 
     static constexpr bool Aligned = ParentRange::Aligned;
 
+    static constexpr bool ConcurrencySafe = ParentRange::ConcurrencySafe;
+
     capptr::Chunk<void> alloc_range(size_t sub_size)
     {
       SNMALLOC_ASSERT(bits::is_pow2(sub_size));