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-rw-r--r--src/env/setenv.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/env/setenv.c b/src/env/setenv.c
index 03e165c8..c2c25444 100644
--- a/src/env/setenv.c
+++ b/src/env/setenv.c
@@ -9,7 +9,7 @@ int setenv(const char *var, const char *value, int overwrite)
char *s;
int l1, l2;
- if (strchr(var, '=')) {
+ if (!var || !*var || strchr(var, '=')) {
errno = EINVAL;
return -1;
}