diff --git a/server/TracyWorker.cpp b/server/TracyWorker.cpp
index 2265026b..88e512a9 100644
--- a/server/TracyWorker.cpp
+++ b/server/TracyWorker.cpp
@@ -33,6 +33,7 @@
 #include "../public/common/TracyVersion.hpp"
 #include "TracyFileRead.hpp"
 #include "TracyFileWrite.hpp"
+#include "TracyPrint.hpp"
 #include "TracySort.hpp"
 #include "TracyTaskDispatch.hpp"
 #include "TracyWorker.hpp"
@@ -776,6 +777,13 @@ Worker::Worker( FileRead& f, EventType::Type eventMask, bool bgTasks, bool allow
     m_data.externalThreadCompress.Load( f );
 
     f.Read( sz );
+    if( sz > std::numeric_limits<int16_t>::max() )
+    {
+        s_loadProgress.total.store( 0, std::memory_order_relaxed );
+        char buf[256];
+        sprintf( buf, "Too many static source locations (%s)", RealToString( sz ) );
+        throw LoadFailure( buf );
+    }
     for( uint64_t i=0; i<sz; i++ )
     {
         uint64_t ptr;
@@ -792,6 +800,13 @@ Worker::Worker( FileRead& f, EventType::Type eventMask, bool bgTasks, bool allow
     const auto sle = sz;
 
     f.Read( sz );
+    if( sz > std::numeric_limits<int16_t>::max() )
+    {
+        s_loadProgress.total.store( 0, std::memory_order_relaxed );
+        char buf[256];
+        sprintf( buf, "Too many dynamic source locations (%s)", RealToString( sz ) );
+        throw LoadFailure( buf );
+    }
     m_data.sourceLocationPayload.reserve_exact( sz, m_slab );
     for( uint64_t i=0; i<sz; i++ )
     {