1 files changed, 3 insertions, 2 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 8656c0219..783204933 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -12001,8 +12001,9 @@ setvar(const char *name, const char *val, int flags)
         }
         INTOFF;
         p = mempcpy(nameeq = ckmalloc(namelen + vallen + 2), name, namelen);
-        *p++ = '=';
-        if (vallen) {
+        *p++ = '\0';
+        if (val) {
+                p[-1] = '=';
                 p = mempcpy(p, val, vallen);
         }
         *p = '\0';