diff --git a/src/cmd/ksh93/include/defs.h b/src/cmd/ksh93/include/defs.h
index 8eab62100..e4ea7d34b 100644
--- a/src/cmd/ksh93/include/defs.h
+++ b/src/cmd/ksh93/include/defs.h
@@ -211,8 +211,8 @@ struct shared
 	unsigned char	ignsig;		/* ignored signal in subshell */ \
 	unsigned char	lastsig;	/* last signal received */ \
 	char		pathinit;	/* pathinit called from subshell */ \
-	char		comsub;		/* set to 1 when in `` comsub, 2 when in $() comsub */ \
-	char		subshare;	/* set when in ${..} comsub */ \
+	char		comsub;		/* set to 1 when in `...`, 2 when in ${ ...; }, 3 when in $(...) */ \
+	char		subshare;	/* set when comsub==2 (shared-state ${ ...; } command substitution) */ \
 	char		toomany;	/* set when out of fd's */ \
 	char		instance;	/* in set_instance */ \
 	char		decomma;	/* decimal_point=',' */ \
diff --git a/src/cmd/ksh93/include/shell.h b/src/cmd/ksh93/include/shell.h
index 77d908dd0..15f32059d 100644
--- a/src/cmd/ksh93/include/shell.h
+++ b/src/cmd/ksh93/include/shell.h
@@ -86,7 +86,6 @@ typedef union Shnode_u Shnode_t;
 #define SH_GMACS	24
 #define SH_EMACS	25
 #define SH_PRIVILEGED	26
-#define SH_SUBSHARE	27	/* subshell shares state with parent */
 #define SH_NOLOG	28
 #define SH_NOTIFY	29
 #define SH_DICTIONARY	30
diff --git a/src/cmd/ksh93/sh/subshell.c b/src/cmd/ksh93/sh/subshell.c
index cd98deb04..51bc5aa16 100644
--- a/src/cmd/ksh93/sh/subshell.c
+++ b/src/cmd/ksh93/sh/subshell.c
@@ -523,7 +523,7 @@ Sfio_t *sh_subshell(Shell_t *shp,Shnode_t *t, volatile int flags, int comsub)
 		job.curpgid = 0;
 	sp->subshare = shp->subshare;
 	sp->comsub = shp->comsub;
-	shp->subshare = comsub==2 ||  (comsub==1 && sh_isoption(SH_SUBSHARE));
+	shp->subshare = comsub==2;
 	if(comsub)
 	{
 		shp->comsub = comsub;