diff --git a/src/internal/abi/abi_amd64.go b/src/internal/abi/abi_amd64.go
index 6574d4216d..70e2ed1feb 100644
--- a/src/internal/abi/abi_amd64.go
+++ b/src/internal/abi/abi_amd64.go
@@ -9,12 +9,16 @@ package abi
 const (
 	// See abi_generic.go.
 
+	// Currently these values are zero because whatever uses
+	// them will expect the register ABI, which isn't ready
+	// yet.
+
 	// RAX, RBX, RCX, RDI, RSI, R8, R9, R10, R11.
-	IntArgRegs = 9
+	IntArgRegs = 0 // 9
 
 	// X0 -> X14.
-	FloatArgRegs = 15
+	FloatArgRegs = 0 // 15
 
 	// We use SSE2 registers which support 64-bit float operations.
-	EffectiveFloatRegSize = 8
+	EffectiveFloatRegSize = 0 // 8
 )