diff --git a/clang-tools-extra/clang-tidy/misc/SuspiciousStringCompareCheck.cpp b/clang-tools-extra/clang-tidy/misc/SuspiciousStringCompareCheck.cpp
index 4730626b62da..0361d315e112 100644
--- a/clang-tools-extra/clang-tidy/misc/SuspiciousStringCompareCheck.cpp
+++ b/clang-tools-extra/clang-tidy/misc/SuspiciousStringCompareCheck.cpp
@@ -22,50 +22,50 @@ AST_MATCHER(BinaryOperator, isComparisonOperator) {
   return Node.isComparisonOp();
 }
 
-constexpr char KnownStringCompareFunctions[] = "__builtin_memcmp;"
-                                               "__builtin_strcasecmp;"
-                                               "__builtin_strcmp;"
-                                               "__builtin_strncasecmp;"
-                                               "__builtin_strncmp;"
-                                               "_mbscmp;"
-                                               "_mbscmp_l;"
-                                               "_mbsicmp;"
-                                               "_mbsicmp_l;"
-                                               "_mbsnbcmp;"
-                                               "_mbsnbcmp_l;"
-                                               "_mbsnbicmp;"
-                                               "_mbsnbicmp_l;"
-                                               "_mbsncmp;"
-                                               "_mbsncmp_l;"
-                                               "_mbsnicmp;"
-                                               "_mbsnicmp_l;"
-                                               "_memicmp;"
-                                               "_memicmp_l;"
-                                               "_stricmp;"
-                                               "_stricmp_l;"
-                                               "_strnicmp;"
-                                               "_strnicmp_l;"
-                                               "_wcsicmp;"
-                                               "_wcsicmp_l;"
-                                               "_wcsnicmp;"
-                                               "_wcsnicmp_l;"
-                                               "lstrcmp;"
-                                               "lstrcmpi;"
-                                               "memcmp;"
-                                               "memicmp;"
-                                               "strcasecmp;"
-                                               "strcmp;"
-                                               "strcmpi;"
-                                               "stricmp;"
-                                               "strncasecmp;"
-                                               "strncmp;"
-                                               "strnicmp;"
-                                               "wcscasecmp;"
-                                               "wcscmp;"
-                                               "wcsicmp;"
-                                               "wcsncmp;"
-                                               "wcsnicmp;"
-                                               "wmemcmp;";
+static const char KnownStringCompareFunctions[] = "__builtin_memcmp;"
+                                                  "__builtin_strcasecmp;"
+                                                  "__builtin_strcmp;"
+                                                  "__builtin_strncasecmp;"
+                                                  "__builtin_strncmp;"
+                                                  "_mbscmp;"
+                                                  "_mbscmp_l;"
+                                                  "_mbsicmp;"
+                                                  "_mbsicmp_l;"
+                                                  "_mbsnbcmp;"
+                                                  "_mbsnbcmp_l;"
+                                                  "_mbsnbicmp;"
+                                                  "_mbsnbicmp_l;"
+                                                  "_mbsncmp;"
+                                                  "_mbsncmp_l;"
+                                                  "_mbsnicmp;"
+                                                  "_mbsnicmp_l;"
+                                                  "_memicmp;"
+                                                  "_memicmp_l;"
+                                                  "_stricmp;"
+                                                  "_stricmp_l;"
+                                                  "_strnicmp;"
+                                                  "_strnicmp_l;"
+                                                  "_wcsicmp;"
+                                                  "_wcsicmp_l;"
+                                                  "_wcsnicmp;"
+                                                  "_wcsnicmp_l;"
+                                                  "lstrcmp;"
+                                                  "lstrcmpi;"
+                                                  "memcmp;"
+                                                  "memicmp;"
+                                                  "strcasecmp;"
+                                                  "strcmp;"
+                                                  "strcmpi;"
+                                                  "stricmp;"
+                                                  "strncasecmp;"
+                                                  "strncmp;"
+                                                  "strnicmp;"
+                                                  "wcscasecmp;"
+                                                  "wcscmp;"
+                                                  "wcsicmp;"
+                                                  "wcsncmp;"
+                                                  "wcsnicmp;"
+                                                  "wmemcmp;";
 
 static const char StringCompareLikeFunctionsDelimiter[] = ";";