diff --git a/config.m4 b/config.m4
index e05ed68..48e2608 100644
--- a/config.m4
+++ b/config.m4
@@ -14,8 +14,6 @@ if test "$PHP_OAUTH" != "no"; then
   PHP_NEW_EXTENSION(oauth, oauth.c provider.c, $ext_shared)
   CFLAGS="$CFLAGS -Wall -g"
 
-  AC_CHECK_HEADER(pcre.h, , [AC_MSG_ERROR([Couldn't find pcre.h, try installing the libpcre development/headers package])])
-
   AS_IF([test "x$with_curl" != "xno"],
       [
         AC_MSG_CHECKING(for cURL in default path)