diff --git a/src/crystal/system/unix/signal.cr b/src/crystal/system/unix/signal.cr
index 58b1180f56ef..d0fdbf298391 100644
--- a/src/crystal/system/unix/signal.cr
+++ b/src/crystal/system/unix/signal.cr
@@ -153,7 +153,7 @@ module Crystal::System::Signal
     if is_stack_overflow
       Crystal::System.print_error "Stack overflow (e.g., infinite or very deep recursion)\n"
     else
-      Crystal::System.print_error "Invalid memory access (signal %d) at address 0x%lx\n", sig, addr
+      Crystal::System.print_error "Invalid memory access (signal %d) at address %p\n", sig, addr
     end
 
     Exception::CallStack.print_backtrace
diff --git a/src/exception/call_stack/libunwind.cr b/src/exception/call_stack/libunwind.cr
index 220db21b71f0..81943d99f376 100644
--- a/src/exception/call_stack/libunwind.cr
+++ b/src/exception/call_stack/libunwind.cr
@@ -102,7 +102,7 @@ struct Exception::CallStack
   end
 
   private def self.print_frame(repeated_frame)
-    Crystal::System.print_error "[0x%llx] ", repeated_frame.ip.address.to_u64
+    Crystal::System.print_error "[%p] ", repeated_frame.ip.address
     print_frame_location(repeated_frame)
     Crystal::System.print_error " (%d times)", repeated_frame.count + 1 unless repeated_frame.count == 0
     Crystal::System.print_error "\n"
diff --git a/src/exception/call_stack/stackwalk.cr b/src/exception/call_stack/stackwalk.cr
index f49c87fae623..4879ed8bb95d 100644
--- a/src/exception/call_stack/stackwalk.cr
+++ b/src/exception/call_stack/stackwalk.cr
@@ -37,7 +37,7 @@ struct Exception::CallStack
       case exception_info.value.exceptionRecord.value.exceptionCode
       when LibC::EXCEPTION_ACCESS_VIOLATION
         addr = exception_info.value.exceptionRecord.value.exceptionInformation[1]
-        Crystal::System.print_error "Invalid memory access (C0000005) at address 0x%llx\n", addr
+        Crystal::System.print_error "Invalid memory access (C0000005) at address %p\n", Pointer(Void).new(addr)
         print_backtrace(exception_info)
         LibC._exit(1)
       when LibC::EXCEPTION_STACK_OVERFLOW
@@ -150,7 +150,7 @@ struct Exception::CallStack
   end
 
   private def self.print_frame(repeated_frame)
-    Crystal::System.print_error "[0x%llx] ", repeated_frame.ip.address.to_u64
+    Crystal::System.print_error "[%p] ", repeated_frame.ip.address
     print_frame_location(repeated_frame)
     Crystal::System.print_error " (%d times)", repeated_frame.count + 1 unless repeated_frame.count == 0
     Crystal::System.print_error "\n"