1 files changed, 4 insertions, 0 deletions

diff --git a/st.c b/st.c
index a2564f8..cf329fd 100644
--- a/st.c
+++ b/st.c
@@ -739,6 +739,10 @@ execsh(void) {
         char **args;
         char *envshell = getenv("SHELL");
 
+        unsetenv("COLUMNS");
+        unsetenv("LINES");
+        unsetenv("TERMCAP");
+
         DEFAULT(envshell, SHELL);
         putenv("TERM="TNAME);
         args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};