diff --git a/src/popupmnu.c b/src/popupmnu.c
index ba9c7ad..2639d97 100644
--- a/src/popupmnu.c
+++ b/src/popupmnu.c
@@ -1102,12 +1102,19 @@
 	    else
 		thislen = item->bytelen;
 
-	    /* put indent at the start */
+	    // put indent at the start
 	    p = alloc(thislen + item->indent * 2 + 1);
+	    if (p == NULL)
+	    {
+		for (line = 0; line <= height - 1; ++line)
+		    vim_free((*array)[line].pum_text);
+		vim_free(*array);
+		goto failed;
+	    }
 	    for (ind = 0; ind < item->indent * 2; ++ind)
 		p[ind] = ' ';
 
-	    /* exclude spaces at the end of the string */
+	    // exclude spaces at the end of the string
 	    for (copylen = thislen; copylen > 0; --copylen)
 		if (item->start[skip + copylen - 1] != ' ')
 		    break;