diff --git a/Changes b/Changes
index e077cf002..6f966a0cb 100644
--- a/Changes
+++ b/Changes
@@ -8,6 +8,8 @@ The contributors that suggested a given feature are shown in []. Thanks!
 
 ****  Support "'dx" constants, bug1423. [Udi Finkelstein]
 
+****  For FST tracing use LZ4 compression. [Tony Bybell]
+
 ****  Add error when use parameters without value, bug1424. [Peter Gerst]
 
 ****  Fix missing VL_SHIFTL_ errors, bug1412, bug1415. [Larry Lee]
diff --git a/include/verilated_fst_c.cpp b/include/verilated_fst_c.cpp
index b6682a04b..2055284d4 100644
--- a/include/verilated_fst_c.cpp
+++ b/include/verilated_fst_c.cpp
@@ -72,6 +72,7 @@ VerilatedFst::VerilatedFst(void* fst)
 void VerilatedFst::open(const char* filename) VL_MT_UNSAFE {
     m_assertOne.check();
     m_fst = fstWriterCreate(filename, 1);
+    fstWriterSetPackType(m_fst, FST_WR_PT_LZ4);
     m_curScope.clear();
 
     for (vluint32_t ent = 0; ent< m_callbacks.size(); ++ent) {