diff --git a/README.adoc b/README.adoc
index 0c7a5be..e489a67 100644
--- a/README.adoc
+++ b/README.adoc
@@ -11588,10 +11588,16 @@ And then watch the assertion fail:
 with error message:
 
 ....
-error 1 at line 8
+assert_eq_64 failed
+val1 0x3
+val2 0x4
+error: asm_main returned 1 at line 8
 ....
 
-and notice how we give the actual assembly line number where the failing assert was!
+and notice how the error message gives both:
+
+* the actual assembly source line number where the failing assert was
+* the actual and expected values
 
 Other setup sanity checks that you might want to look into include:
 
diff --git a/userland/arch/x86_64/common_arch.h b/userland/arch/x86_64/common_arch.h
index d94e3d4..26e37e4 100644
--- a/userland/arch/x86_64/common_arch.h
+++ b/userland/arch/x86_64/common_arch.h
@@ -3,6 +3,7 @@
 #ifndef COMMON_ARCH_H
 #define COMMON_ARCH_H
 
+#if 0
 #define ASSERT_EQ(reg, const) \
     push %rax; \
     push %rbx; \
@@ -13,6 +14,19 @@
     pop %rax; \
     ASSERT(je); \
 ;
+#endif
+
+#define ASSERT_EQ(reg, const) \
+    mov reg, %rdi; \
+    mov const, %rsi; \
+    ASSERT_EQ_DO(64); \
+;
+
+#define ASSERT_EQ_DO(bits) \
+    call assert_eq_ ## bits; \
+    cmp $0, %rax; \
+    ASSERT(je); \
+;
 
 # TODO
 ##define ASSERT_MEMCMP(s1, s2, n) \