diff --git a/src/support/lockedpool.cpp b/src/support/lockedpool.cpp
index 52ee13385..6a7e5d628 100644
--- a/src/support/lockedpool.cpp
+++ b/src/support/lockedpool.cpp
@@ -145,7 +145,7 @@ Arena::Stats Arena::stats() const
 }
 
 #ifdef ARENA_DEBUG
-void printchunk(char* base, size_t sz, bool used) {
+static void printchunk(void* base, size_t sz, bool used) {
     std::cout <<
         "0x" << std::hex << std::setw(16) << std::setfill('0') << base <<
         " 0x" << std::hex << std::setw(16) << std::setfill('0') << sz <<