diff --git a/src/bindings/perl/Makefile.PL b/src/bindings/perl/Makefile.PL
index c9bf9db..4e457fc 100644
--- a/src/bindings/perl/Makefile.PL
+++ b/src/bindings/perl/Makefile.PL
@@ -10,6 +10,6 @@ WriteMakefile(
     LIBS => ["-lhammer"],
     OBJECT => 'hammer_wrap.o',
     INC => '-I../..',
-    CCFLAGS => "$Config{ccflags} -DSWIG -DHAMMER_INTERNAL__NO_STDARG_H -std=gnu99",
+    CCFLAGS => "$Config{ccflags} -DSWIG -std=gnu99",
     );
 
diff --git a/src/hammer.h b/src/hammer.h
index e536c0b..7715774 100644
--- a/src/hammer.h
+++ b/src/hammer.h
@@ -34,9 +34,10 @@ extern "C" {
 #endif
 
 #ifndef __cplusplus
-#ifndef HAMMER_INTERNAL__NO_STDARG_H
-typedef int bool;
-#endif // HAMMER_INTERNAL__NO_STDARG_H
+#include <stdbool.h>
+  //#ifndef HAMMER_INTERNAL__NO_STDARG_H
+  //typedef int bool;
+  //#endif // HAMMER_INTERNAL__NO_STDARG_H
 #endif
 
 typedef struct HParseState_ HParseState;