diff --git a/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp b/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
--- a/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
@@ -407,6 +407,8 @@
 static std::string
 fixupWithStyle(StringRef Name,
                const IdentifierNamingCheck::NamingStyle &Style) {
+  Name.consume_front(Style.Prefix);
+  Name.consume_back(Style.Suffix);
   const std::string Fixed = fixupWithCase(
       Name, Style.Case.getValueOr(IdentifierNamingCheck::CaseType::CT_AnyCase));
   StringRef Mid = StringRef(Fixed).trim("_");
diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability-identifier-naming.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability-identifier-naming.cpp
--- a/clang-tools-extra/test/clang-tidy/checkers/readability-identifier-naming.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/readability-identifier-naming.cpp
@@ -148,6 +148,10 @@
 int g_twice_global3 = ADD_TO_SELF(global3);
 // CHECK-FIXES: {{^}}int g_twice_global3 = ADD_TO_SELF(g_global3);{{$}}
 
+int g_Global4;
+// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: invalid case style for global variable 'g_Global4'
+// CHECK-FIXES: {{^}}int g_global4;{{$}}
+
 enum my_enumeration {
 // CHECK-MESSAGES: :[[@LINE-1]]:6: warning: invalid case style for enum 'my_enumeration'
 // CHECK-FIXES: {{^}}enum EMyEnumeration {{{$}}
@@ -544,6 +548,9 @@
 // CHECK-FIXES: {{^}}unsigned const MY_CONST_GLOBAL_ARRAY[] = {1,2,3};{{$}}
 
 int * MyGlobal_Ptr;// -> ok
+int * my_second_global_Ptr;
+// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: invalid case style for global pointer 'my_second_global_Ptr'
+// CHECK-FIXES: {{^}}int * MySecondGlobal_Ptr;{{$}}
 int * const MyConstantGlobalPointer = nullptr;
 // CHECK-MESSAGES: :[[@LINE-1]]:13: warning: invalid case style for global constant pointer 'MyConstantGlobalPointer'
 // CHECK-FIXES: {{^}}int * const MY_CONSTANT_GLOBAL_POINTER_Ptr = nullptr;{{$}}