diff --git a/server/TracyWorker.cpp b/server/TracyWorker.cpp
index ddddf219..2265026b 100644
--- a/server/TracyWorker.cpp
+++ b/server/TracyWorker.cpp
@@ -3326,6 +3326,12 @@ void Worker::NewSourceLocation( uint64_t ptr )
 {
     static const SourceLocation emptySourceLocation = {};
 
+    if( m_data.sourceLocation.size() > std::numeric_limits<int16_t>::max() )
+    {
+        SourceLocationOverflowFailure();
+        return;
+    }
+
     m_data.sourceLocation.emplace( ptr, emptySourceLocation );
     m_pendingSourceLocation++;
     m_sourceLocationQueue.push_back( ptr );
@@ -3708,6 +3714,11 @@ void Worker::AddSourceLocationPayload( const char* data, size_t sz )
         auto slptr = m_slab.Alloc<SourceLocation>();
         memcpy( slptr, &srcloc, sizeof( srcloc ) );
         uint32_t idx = m_data.sourceLocationPayload.size();
+        if( idx+1 > std::numeric_limits<int16_t>::max() )
+        {
+            SourceLocationOverflowFailure();
+            return;
+        }
         m_data.sourceLocationPayloadMap.emplace( slptr, idx );
         m_pendingSourceLocationPayload = -int16_t( idx + 1 );
         m_data.sourceLocationPayload.push_back( slptr );