Patch line receives error

I have a script and patch that I took somewhere to compile an image (linux build root) and I added some lines and now I got one error during patch, the error is like that:

diff --git a/package/base-files/files/bin/config_generate b/package/base-files/files/bin/config_generate

index fecf82fcaa..fff80d6efc 100755

--- a/package/base-files/files/bin/config_generate

+++ b/package/base-files/files/bin/config_generate

@@ -312,10 +312,10 @@ generate_static_system() {

the problem seems to be with the numbers

-312,10 +312,10

idea? thanks EDIT: here some more info, during OpenWrt compilation, I want to add some changes automatically, those changes will be in a script, and it will apply the patch in some files. Ie: that part generate_static_system() { uci -q batch <<-EOF delete system.@system add system system set system.@system[-1].hostname='OpenWrt' set system.@system[-1].timezone='EST5EDT,M3.2.0,M11.1.0' set system.@system[-1].zonename='America/New York' set system.@system[-1].ttylogin='0' set system.@system[-1].log_size='384' set system.@system[-1].urandom_seed='0' to: generate_static_system() { uci -q batch <<-EOF delete system.@system add system system set system.@system[-1].hostname='james_router2' set system.@system[-1].timezone='EST5EDT,M3.2.0,M11.1.0' set system.@system[-1].zonename='America/Toronto' set system.@system[-1].ttylogin='0' set system.@system[-1].log_size='384' set system.@system[-1].urandom_seed='0' this is a part into a bigger file, in : package/base-files/files/bin/config_generate b/package/base-files/files/bin/config_generate