diff --git a/c++/include/orc/Int128.hh b/c++/include/orc/Int128.hh
index 81cee0538..7c88e49c8 100644
--- a/c++/include/orc/Int128.hh
+++ b/c++/include/orc/Int128.hh
@@ -325,14 +325,14 @@ namespace orc {
     /**
      * Get the high bits of the twos complement representation of the number.
      */
-    int64_t getHighBits() {
+    int64_t getHighBits() const {
       return highbits;
     }
 
     /**
      * Get the low bits of the twos complement representation of the number.
      */
-    uint64_t getLowBits() {
+    uint64_t getLowBits() const {
       return lowbits;
     }
 
diff --git a/c++/include/orc/MemoryPool.hh b/c++/include/orc/MemoryPool.hh
index e9df39052..89d0dd17d 100644
--- a/c++/include/orc/MemoryPool.hh
+++ b/c++/include/orc/MemoryPool.hh
@@ -64,7 +64,7 @@ namespace orc {
       return buf;
     }
 
-    uint64_t size() {
+    uint64_t size() const {
       return currentSize;
     }
 

For the record this is using ORC revision 542353d38daec11cdd632e5b999884ea0a7e3539 (head of 1.9 branch). Also applying this seems to fix the compilation issues: ```diff diff --git a/c++/include/orc/Int128.hh b/c++/include/orc/Int128.hh index 81cee0538..7c88e49c8 100644 --- a/c++/include/orc/Int128.hh +++ b/c++/include/orc/Int128.hh @@ -325,14 +325,14 @@ namespace orc { /** * Get the high bits of the twos complement representation of the number. */ - int64_t getHighBits() { + int64_t getHighBits() const { return highbits; } /** * Get the low bits of the twos complement representation of the number. */ - uint64_t getLowBits() { + uint64_t getLowBits() const { return lowbits; } diff --git a/c++/include/orc/MemoryPool.hh b/c++/include/orc/MemoryPool.hh index e9df39052..89d0dd17d 100644 --- a/c++/include/orc/MemoryPool.hh +++ b/c++/include/orc/MemoryPool.hh @@ -64,7 +64,7 @@ namespace orc { return buf; } - uint64_t size() { + uint64_t size() const { return currentSize; } ```