diff --git a/include/verilated.cpp b/include/verilated.cpp
index 14521d7b9..8677f3154 100644
--- a/include/verilated.cpp
+++ b/include/verilated.cpp
@@ -1740,9 +1740,7 @@ void VlReadMem::setData(void* valuep, const std::string& rhs) {
 }
 
 VlWriteMem::VlWriteMem(bool hex, int bits, const std::string& filename, QData start, QData end)
-    : m_hex(hex)
-    , m_bits(bits)
-    , m_filename(filename)
+    : m_bits(bits)
     , m_addr(0) {
     if (VL_UNLIKELY(!hex)) {
         VL_FATAL_MT(filename.c_str(), 0, "",
diff --git a/include/verilated_heavy.h b/include/verilated_heavy.h
index f1e61a185..c04ee3214 100644
--- a/include/verilated_heavy.h
+++ b/include/verilated_heavy.h
@@ -65,9 +65,7 @@ public:
 };
 
 class VlWriteMem {
-    bool m_hex;  // Hex format
     int m_bits;  // Bit width of values
-    const std::string& m_filename;  // Filename
     FILE* m_fp;  // File handle for filename
     QData m_addr;  // Next address to write
 public: