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-rw-r--r--src/nvim/runtime.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/runtime.c b/src/nvim/runtime.c
index 3487a8d7a2..a6ed95ec64 100644
--- a/src/nvim/runtime.c
+++ b/src/nvim/runtime.c
@@ -1607,7 +1607,7 @@ char *runtimepath_default(bool clean_arg)
data_len = strlen(data_home);
size_t nvim_data_size = appname_len;
#if defined(MSWIN)
- nvim_data_size += sizeof("-data");
+ nvim_data_size += sizeof("-data") - 1; // -1: NULL byte should be ignored
#endif
if (data_len != 0) {
rtp_size += ((data_len + memcnt(data_home, ',', data_len)