diff --git a/m4/libcurl.m4 b/m4/libcurl.m4
index 6e1010ef03..6f87eb0ce0 100644
--- a/m4/libcurl.m4
+++ b/m4/libcurl.m4
@@ -67,7 +67,7 @@ AC_DEFUN([LIBCURL_CHECK_CONFIG],
      if test -d "$_libcurl_with" ; then
         CPPFLAGS="${CPPFLAGS} -I$withval/include"
         LDFLAGS="${LDFLAGS} -L$withval/lib"
-        PATH="$withval/bin:${PATH}"
+        PATH="${withval%/}/bin:$PATH"
      fi
 
      AC_PATH_PROG([_libcurl_config],[curl-config])