diff --git a/include/nlohmann/detail/input/input_adapters.hpp b/include/nlohmann/detail/input/input_adapters.hpp
index 98fb29a99..6df58a1cd 100644
--- a/include/nlohmann/detail/input/input_adapters.hpp
+++ b/include/nlohmann/detail/input/input_adapters.hpp
@@ -11,7 +11,7 @@
 #include <utility> // pair, declval
 
 #ifndef JSON_NO_IO
-    #include <cstdio>   //FILE *
+    #include <cstdio>   // FILE *
     #include <istream>  // istream
 #endif                  // JSON_NO_IO
 
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 5bcd9308f..b5c35e938 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -5263,7 +5263,7 @@ std::size_t hash(const BasicJsonType& j)
 #include <utility> // pair, declval
 
 #ifndef JSON_NO_IO
-    #include <cstdio>   //FILE *
+    #include <cstdio>   // FILE *
     #include <istream>  // istream
 #endif                  // JSON_NO_IO