diff --git a/usr.bin/svn/lib/libapr_util/apu.h b/usr.bin/svn/lib/libapr_util/apu.h
index 4631ae704a66..575d633162d7 100644
--- a/usr.bin/svn/lib/libapr_util/apu.h
+++ b/usr.bin/svn/lib/libapr_util/apu.h
@@ -122,7 +122,9 @@
 #define APU_HAVE_NSS           0
 
 #define APU_HAVE_APR_ICONV     0
+#ifndef APU_HAVE_ICONV
 #define APU_HAVE_ICONV         0
+#endif
 #define APR_HAS_XLATE          (APU_HAVE_APR_ICONV || APU_HAVE_ICONV)
 
 #endif /* APU_H */