diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 8ddac37..ef3fa66 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -1875,10 +1875,10 @@
 
 // Commands that are recognized only in find_ex_command().
 EXCMD(CMD_increment,	"++",		ex_incdec,
-	EX_EXTRA|EX_NOTRLCOM|EX_SBOXOK|EX_CMDWIN|EX_LOCK_OK,
+	EX_EXTRA|EX_TRLBAR|EX_SBOXOK|EX_CMDWIN|EX_LOCK_OK,
 	ADDR_NONE),
 EXCMD(CMD_decrement,	"--",		ex_incdec,
-	EX_EXTRA|EX_NOTRLCOM|EX_SBOXOK|EX_CMDWIN|EX_LOCK_OK,
+	EX_EXTRA|EX_TRLBAR|EX_SBOXOK|EX_CMDWIN|EX_LOCK_OK,
 	ADDR_NONE),
 
 #undef EXCMD
diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index 1d3c20e..a26867f 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -1889,6 +1889,10 @@
       assert_equal(8, nr)
       --nr
       assert_equal(7, nr)
+      ++nr | ++nr
+      assert_equal(9, nr)
+      ++nr # comment
+      assert_equal(10, nr)
 
       var ll = [1, 2]
       --ll[0]
diff --git a/src/version.c b/src/version.c
index 1ecb567..3898725 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3047,
+/**/
     3046,
 /**/
     3045,
diff --git a/src/vim9script.c b/src/vim9script.c
index 7078cbe..7c6526b 100644
--- a/src/vim9script.c
+++ b/src/vim9script.c
@@ -166,19 +166,23 @@
 ex_incdec(exarg_T *eap)
 {
     char_u	*cmd = eap->cmd;
-    size_t	len = STRLEN(eap->cmd) + 6;
+    char_u	*nextcmd = eap->nextcmd;
+    size_t	len = STRLEN(eap->cmd) + 8;
 
     // This works like "nr += 1" or "nr -= 1".
+    // Add a '|' to avoid looking in the next line.
     eap->cmd = alloc(len);
     if (eap->cmd == NULL)
 	return;
-    vim_snprintf((char *)eap->cmd, len, "%s %c= 1", cmd + 2,
+    vim_snprintf((char *)eap->cmd, len, "%s %c= 1 |", cmd + 2,
 				     eap->cmdidx == CMD_increment ? '+' : '-');
     eap->arg = eap->cmd;
     eap->cmdidx = CMD_var;
+    eap->nextcmd = NULL;
     ex_let(eap);
     vim_free(eap->cmd);
     eap->cmd = cmd;
+    eap->nextcmd = nextcmd;
 }
 
 /*