diff --git a/src/libr-bfd.h b/src/libr-bfd.h
index 7b6ea3e..9fae8f5 100644
--- a/src/libr-bfd.h
+++ b/src/libr-bfd.h
@@ -7,11 +7,12 @@
 #include <stdint.h>
 #include <bfd.h>
 
-#if BFD_HOST_64BIT_LONG
+#if (__WORDSIZE == 64)
 	#if defined(__i386)
 		#error "Using incorrect binutils header file for architecture."
 	#endif
-#else
+#endif
+#if (__WORDSIZE == 32)
 	#if defined(__amd64)
 		#error "Using incorrect binutils header file for architecture."
 	#endif