diff --git a/src/lexer.c b/src/lexer.c
index fe2ac47fc479..719b3c4eff19 100644
--- a/src/lexer.c
+++ b/src/lexer.c
@@ -1585,6 +1585,8 @@ TOK Lexer::delimitedStringConstant(Token *t)
 Ldone:
     if (*p == '"')
         p++;
+    else if (hereid)
+        error("delimited string must end in %s\"", hereid->toChars());
     else
         error("delimited string must end in %c\"", delimright);
     t->len = stringbuffer.offset;
diff --git a/test/fail_compilation/diag10805.d b/test/fail_compilation/diag10805.d
new file mode 100644
index 000000000000..fa52d9aca472
--- /dev/null
+++ b/test/fail_compilation/diag10805.d
@@ -0,0 +1,12 @@
+/*
+TEST_OUTPUT:
+---
+fail_compilation/diag10805.d(10): Error: delimited string must end in FOO"
+fail_compilation/diag10805.d(12): Error: unterminated string constant starting at fail_compilation/diag10805.d(12)
+fail_compilation/diag10805.d(13): Error: semicolon expected following auto declaration, not 'EOF'
+---
+*/
+
+enum s = q"FOO
+FOO
+";