diff --git a/instructionAPI/src/x86/decoder.C b/instructionAPI/src/x86/decoder.C
index d62c81044f..5929d2410b 100644
--- a/instructionAPI/src/x86/decoder.C
+++ b/instructionAPI/src/x86/decoder.C
@@ -74,7 +74,7 @@ namespace Dyninst { namespace InstructionAPI {
     // The iterator form of disassembly allows reuse of the instruction object, reducing
     // the number of memory allocations.
     if(!cs_disasm_iter(dis.handle, &code, &codeSize, &cap_addr, dis.insn)) {
-      decode_printf("Failed to disassemble instruction at %p: %s\n", static_cast<void*>(code),
+      decode_printf("Failed to disassemble instruction at %p: %s\n", static_cast<void const*>(code),
                     cs_strerror(cs_errno(dis.handle)));
       return;
     }
@@ -92,7 +92,7 @@ namespace Dyninst { namespace InstructionAPI {
     // The iterator form of disassembly allows reuse of the instruction object, reducing
     // the number of memory allocations.
     if(!cs_disasm_iter(dis.handle, &code, &codeSize, &cap_addr, dis.insn)) {
-      decode_printf("Failed to disassemble instruction at %p: %s\n", static_cast<void*>(code),
+      decode_printf("Failed to disassemble instruction at %p: %s\n", static_cast<void const*>(code),
                     cs_strerror(cs_errno(dis.handle)));
       m_Operation = Operation(e_No_Entry, "INVALID", m_Arch);
       return;