diff --git a/src/arch/sparc.c b/src/arch/sparc.c
index 6adaa41..d550e8f 100644
--- a/src/arch/sparc.c
+++ b/src/arch/sparc.c
@@ -30,6 +30,7 @@ static ArchRegister _sparc_registers[] =
 #include "sparc.reg"
 	{ NULL,		0, 0 }
 };
+#undef REG
 
 static ArchInstruction _sparc_instructions[] =
 {
diff --git a/src/arch/sparc64.c b/src/arch/sparc64.c
index 04bc37f..599d489 100644
--- a/src/arch/sparc64.c
+++ b/src/arch/sparc64.c
@@ -31,6 +31,7 @@ static ArchRegister _sparc64_registers[] =
 #include "sparc.reg"
 	{ NULL,		0, 0 }
 };
+#undef REG
 
 static ArchInstruction _sparc64_instructions[] =
 {