diff --git a/src/alloy/frontend/ppc/ppc_disasm.cc b/src/alloy/frontend/ppc/ppc_disasm.cc
index 3ba0fce8d..f0444ae76 100644
--- a/src/alloy/frontend/ppc/ppc_disasm.cc
+++ b/src/alloy/frontend/ppc/ppc_disasm.cc
@@ -143,7 +143,7 @@ void Disasm_X_RA_RT(InstrData& i, StringBuffer* str) {
 #define VX128_2_VD128 (i.VX128_2.VD128l | (i.VX128_2.VD128h << 5))
 #define VX128_2_VA128 \
   (i.VX128_2.VA128l | (i.VX128_2.VA128h << 5) | (i.VX128_2.VA128H << 6))
-#define VX128_2_VB128 (i.VX128_2.VB128l | (i.VX128_2.VD128h << 5))
+#define VX128_2_VB128 (i.VX128_2.VB128l | (i.VX128_2.VB128h << 5))
 #define VX128_2_VC (i.VX128_2.VC)
 #define VX128_3_VD128 (i.VX128_3.VD128l | (i.VX128_3.VD128h << 5))
 #define VX128_3_VB128 (i.VX128_3.VB128l | (i.VX128_3.VB128h << 5))
diff --git a/src/alloy/frontend/ppc/ppc_emit_altivec.cc b/src/alloy/frontend/ppc/ppc_emit_altivec.cc
index 9867d62b4..09e5fddb8 100644
--- a/src/alloy/frontend/ppc/ppc_emit_altivec.cc
+++ b/src/alloy/frontend/ppc/ppc_emit_altivec.cc
@@ -47,7 +47,7 @@ Value* CalculateEA_0(PPCHIRBuilder& f, uint32_t ra, uint32_t rb);
 #define VX128_2_VD128 (i.VX128_2.VD128l | (i.VX128_2.VD128h << 5))
 #define VX128_2_VA128 \
   (i.VX128_2.VA128l | (i.VX128_2.VA128h << 5) | (i.VX128_2.VA128H << 6))
-#define VX128_2_VB128 (i.VX128_2.VB128l | (i.VX128_2.VD128h << 5))
+#define VX128_2_VB128 (i.VX128_2.VB128l | (i.VX128_2.VB128h << 5))
 #define VX128_2_VC (i.VX128_2.VC)
 #define VX128_3_VD128 (i.VX128_3.VD128l | (i.VX128_3.VD128h << 5))
 #define VX128_3_VB128 (i.VX128_3.VB128l | (i.VX128_3.VB128h << 5))