diff --git a/c++/src/H5Attribute.cpp b/c++/src/H5Attribute.cpp
index 4df96d46d77..2161b8112f2 100644
--- a/c++/src/H5Attribute.cpp
+++ b/c++/src/H5Attribute.cpp
@@ -607,7 +607,8 @@ Attribute::~Attribute()
 
 //--------------------------------------------------------------------------
 // Function:    Copy assignment operator
-Attribute & Attribute::operator= (const Attribute &other)
+Attribute &
+Attribute::operator=(const Attribute &other)
 {
     if (&other != this) {
     }
diff --git a/c++/src/H5Attribute.h b/c++/src/H5Attribute.h
index f50281ea83f..1db91ec2980 100644
--- a/c++/src/H5Attribute.h
+++ b/c++/src/H5Attribute.h
@@ -79,7 +79,7 @@ class H5_DLLCPP Attribute : public AbstractDs, public H5Location {
     virtual ~Attribute() override;
 
     // Copy assignment operator.
-    Attribute & operator= (const Attribute &other);
+    Attribute &operator=(const Attribute &other);
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
   protected:
diff --git a/c++/src/H5Group.cpp b/c++/src/H5Group.cpp
index 2c51f2c9ce5..fc143018e9d 100644
--- a/c++/src/H5Group.cpp
+++ b/c++/src/H5Group.cpp
@@ -276,7 +276,8 @@ Group::~Group()
 
 //--------------------------------------------------------------------------
 // Function:    Copy assignment operator
-Group & Group::operator= (const Group &other)
+Group &
+Group::operator=(const Group &other)
 {
     if (&other != this) {
     }
diff --git a/c++/src/H5Group.h b/c++/src/H5Group.h
index 0a52f81adcd..20b3a1fd2f2 100644
--- a/c++/src/H5Group.h
+++ b/c++/src/H5Group.h
@@ -68,7 +68,7 @@ class H5_DLLCPP Group : public H5Object, public CommonFG {
     virtual ~Group() override;
 
     // Copy assignment operator.
-    Group & operator= (const Group &other);
+    Group &operator=(const Group &other);
 
     // Creates a copy of an existing group using its id.
     Group(const hid_t group_id);