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-rw-r--r--Src/subst.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Src/subst.c b/Src/subst.c
index 90b5fc121..ed3f4a82b 100644
--- a/Src/subst.c
+++ b/Src/subst.c
@@ -796,7 +796,7 @@ filesubstr(char **namptr, int assign)
 	    *namptr = dyncat(hom, ptr);
 	    return 1;
 	}
-    } else if (*str == Equals && isset(EQUALS) && str[1]) {   /* =foo */
+    } else if (*str == Equals && isset(EQUALS) && str[1] && str[1] != Inpar) {   /* =foo */
 	char *expn = equalsubstr(str+1, assign, isset(NOMATCH));
 	if (expn) {
 	    *namptr = expn;