diff --git a/config/iconv.m4 b/config/iconv.m4
index 5f9304a6ba..f1e54c5aed 100644
--- a/config/iconv.m4
+++ b/config/iconv.m4
@@ -73,7 +73,7 @@ AC_DEFUN([AM_ICONV_LINK],
     if test "$am_cv_func_iconv" != yes; then
       am_save_CPPFLAGS="$CPPFLAGS"
       am_save_LIBS="$LIBS"
-      CPPFLAGS="$LIBS $INCICONV"
+      CPPFLAGS="$CPPFLAGS $INCICONV"
       LIBS="$LIBS $LIBICONV"
       AC_TRY_LINK([#include <stdlib.h>
 #include <iconv.h>],