diff --git a/include/nlohmann/detail/output/fancy_serializer.hpp b/include/nlohmann/detail/output/fancy_serializer.hpp
index 6980b29d8..315cba31f 100644
--- a/include/nlohmann/detail/output/fancy_serializer.hpp
+++ b/include/nlohmann/detail/output/fancy_serializer.hpp
@@ -33,6 +33,8 @@ struct fancy_serializer_style
     unsigned int depth_limit = std::numeric_limits<unsigned>::max();
 
     unsigned int strings_maximum_length = 0;
+
+    bool multiline = false;
 };
 
 template<typename BasicJsonType>
@@ -242,7 +244,7 @@ class fancy_serializer
         {
             indent_string.resize(indent_string.size() * 2, active_style->indent_char);
         }
-        const int newline_len = (active_style->indent_step > 0);
+        const int newline_len = (active_style->multiline ? 1 : 0);
 
         o->write_characters("{\n", 1 + newline_len);
 
@@ -287,7 +289,7 @@ class fancy_serializer
         {
             indent_string.resize(indent_string.size() * 2, active_style->indent_char);
         }
-        const int newline_len = (active_style->indent_step > 0);
+        const int newline_len = (active_style->multiline ? 1 : 0);
 
         o->write_characters("[\n", 1 + newline_len);
 
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 5ca8601d3..6edec302f 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -10103,6 +10103,8 @@ struct fancy_serializer_style
     unsigned int depth_limit = std::numeric_limits<unsigned>::max();
 
     unsigned int strings_maximum_length = 0;
+
+    bool multiline = false;
 };
 
 template<typename BasicJsonType>
@@ -10312,7 +10314,7 @@ class fancy_serializer
         {
             indent_string.resize(indent_string.size() * 2, active_style->indent_char);
         }
-        const int newline_len = (active_style->indent_step > 0);
+        const int newline_len = (active_style->multiline ? 1 : 0);
 
         o->write_characters("{\n", 1 + newline_len);
 
@@ -10357,7 +10359,7 @@ class fancy_serializer
         {
             indent_string.resize(indent_string.size() * 2, active_style->indent_char);
         }
-        const int newline_len = (active_style->indent_step > 0);
+        const int newline_len = (active_style->multiline ? 1 : 0);
 
         o->write_characters("[\n", 1 + newline_len);
 
diff --git a/test/src/unit-fancy-serialization.cpp b/test/src/unit-fancy-serialization.cpp
index 26af09939..6f00a9b21 100644
--- a/test/src/unit-fancy-serialization.cpp
+++ b/test/src/unit-fancy-serialization.cpp
@@ -202,6 +202,7 @@ TEST_CASE("serialization")
             CHECK(str_flat == "[1,[...]]");
 
             style.indent_step = 4;
+            style.multiline = true;
             auto str_lines = fancy_to_string({1, {1}}, style);
             CHECK(str_lines == dedent(R"(
                   [
@@ -219,6 +220,7 @@ TEST_CASE("serialization")
             CHECK(str_flat == "[1,{...}]");
 
             style.indent_step = 4;
+            style.multiline = true;
             auto str_lines = fancy_to_string({1, {{"one", 1}}}, style);
             CHECK(str_lines == dedent(R"(
                   [
@@ -234,7 +236,9 @@ TEST_CASE("serialization")
         {
             fancy_serializer_stylizer stylizer;
             stylizer.get_default_style().indent_step = 4;
+            stylizer.get_default_style().multiline = true;
             stylizer.get_or_insert_style("one line").indent_step = 0;
+            stylizer.get_or_insert_style("one line").multiline = false;
 
             auto str = fancy_to_string(
             {
@@ -261,6 +265,7 @@ TEST_CASE("serialization")
         {
             fancy_serializer_stylizer stylizer;
             stylizer.get_default_style().indent_step = 4;
+            stylizer.get_default_style().multiline = 4;
             stylizer.get_or_insert_style("one line").indent_step = 0;
 
             auto str = fancy_to_string(
@@ -282,6 +287,7 @@ TEST_CASE("serialization")
     {
         fancy_serializer_style style;
         style.indent_step = 4;
+        style.multiline = 4;
         auto str = fancy_to_string({"foo", 1, 2, 3, false, {{"one", 1}}}, style);
         CHECK(str == dedent(R"(
               [
@@ -301,6 +307,7 @@ TEST_CASE("serialization")
         fancy_serializer_style style;
         style.indent_step = 1;
         style.indent_char = '\t';
+        style.multiline = true;
 
         auto str = fancy_to_string({"foo", 1, 2, 3, false, {{"one", 1}}}, style);
         CHECK(str ==
@@ -322,6 +329,7 @@ TEST_CASE("serialization")
         fancy_serializer_style style;
         style.indent_step = 300;
         style.indent_char = 'X';
+        style.multiline = true;
 
         auto str = fancy_to_string({1, {1}}, style);
 
@@ -340,6 +348,7 @@ TEST_CASE("serialization")
         fancy_serializer_style style;
         style.indent_step = 300;
         style.indent_char = 'X';
+        style.multiline = true;
 
         auto str = fancy_to_string({{"key", {{"key", 1}}}}, style);