diff --git a/CHANGELOG.md b/CHANGELOG.md
index 596c539d0..b67b80e07 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -69,6 +69,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Implemented fully correct version of GELU instead of using bad approximatin via Swish.
 - Handle copying from fp32 or fp16 embeddings in embedder mode correctly.
 - Correct defaults for factored embeddings such that shared library use works (move out of config.h/cpp).
+- Fixed builds where array lengths must be constexpr.
 
 ### Changed
 - Globally set mkl_set_num_threads(1)
diff --git a/src/3rd_party/ExceptionWithCallStack.cpp b/src/3rd_party/ExceptionWithCallStack.cpp
index 59956d263..176b5490b 100644
--- a/src/3rd_party/ExceptionWithCallStack.cpp
+++ b/src/3rd_party/ExceptionWithCallStack.cpp
@@ -201,7 +201,7 @@ static void CollectCallStack(size_t skipLevels, bool makeFunctionNamesStandOut,
 
 #else // Linux
 
-    unsigned int MAX_NUM_FRAMES = 1024;
+    constexpr unsigned int MAX_NUM_FRAMES = 1024;
     void* backtraceAddresses[MAX_NUM_FRAMES];
     unsigned int numFrames = backtrace(backtraceAddresses, MAX_NUM_FRAMES);
     char** symbolList = backtrace_symbols(backtraceAddresses, numFrames);
@@ -234,7 +234,7 @@ static void CollectCallStack(size_t skipLevels, bool makeFunctionNamesStandOut,
 
             // Mangled name is now in [beginName, beginOffset) and caller offset in [beginOffset, beginAddress).
             int status = 0;
-            unsigned int MAX_FUNCNAME_SIZE = 4096;
+            constexpr unsigned int MAX_FUNCNAME_SIZE = 4096;
             size_t funcNameSize = MAX_FUNCNAME_SIZE;
             char funcName[MAX_FUNCNAME_SIZE]; // working buffer
             const char* ret = abi::__cxa_demangle(beginName, funcName, &funcNameSize, &status);