diff --git a/DataSpec/DNACommon/CMDL.cpp b/DataSpec/DNACommon/CMDL.cpp
index 4081375bd..7f4cb2ffa 100644
--- a/DataSpec/DNACommon/CMDL.cpp
+++ b/DataSpec/DNACommon/CMDL.cpp
@@ -208,7 +208,7 @@ public:
     m_cur = m_dl.get();
   }
 
-  operator bool() { return ((m_cur - m_dl.get()) < intptr_t(m_dlSize)) && *m_cur; }
+  explicit operator bool() const { return ((m_cur - m_dl.get()) < intptr_t(m_dlSize)) && *m_cur; }
 
   GX::Primitive readPrimitive() { return GX::Primitive(*m_cur++ & 0xf8); }
 
diff --git a/DataSpec/DNACommon/DNACommon.hpp b/DataSpec/DNACommon/DNACommon.hpp
index 17809cbb7..4dc5c961a 100644
--- a/DataSpec/DNACommon/DNACommon.hpp
+++ b/DataSpec/DNACommon/DNACommon.hpp
@@ -396,7 +396,7 @@ public:
       ++m_idx;
       return *this;
     }
-    bool operator*() { return m_bmp.getBit(m_idx); }
+    bool operator*() const { return m_bmp.getBit(m_idx); }
     bool operator!=(const Iterator& other) const { return m_idx != other.m_idx; }
   };
   Iterator begin() const { return Iterator(*this, 0); }
diff --git a/DataSpec/DNAMP1/DCLN.hpp b/DataSpec/DNAMP1/DCLN.hpp
index 1839b559b..305828698 100644
--- a/DataSpec/DNAMP1/DCLN.hpp
+++ b/DataSpec/DNAMP1/DCLN.hpp
@@ -74,7 +74,7 @@ struct DCLN : BigDNA {
 #endif
     };
     Node root;
-    size_t getMemoryUsage() { return root.getMemoryUsage(); }
+    size_t getMemoryUsage() const { return root.getMemoryUsage(); }
 
     /* Dummy MP2 member */
     void insertNoClimb(hecl::blender::PyOutStream&) const {}
diff --git a/DataSpec/DNAMP1/SCAN.hpp b/DataSpec/DNAMP1/SCAN.hpp
index 6bd76fc9b..701070ddd 100644
--- a/DataSpec/DNAMP1/SCAN.hpp
+++ b/DataSpec/DNAMP1/SCAN.hpp
@@ -98,7 +98,7 @@ struct SCAN : BigDNA {
     }
   }
 
-  void gatherDependencies(std::vector<hecl::ProjectPath>& pathsOut) {
+  void gatherDependencies(std::vector<hecl::ProjectPath>& pathsOut) const {
     g_curSpec->flattenDependencies(frame, pathsOut);
     g_curSpec->flattenDependencies(string, pathsOut);
     for (int i = 0; i < 4; ++i)