diff --git a/src/libs/qtcreatorcdbext/stringutils.cpp b/src/libs/qtcreatorcdbext/stringutils.cpp
index 420e5b7e044..b7bf18e5bce 100644
--- a/src/libs/qtcreatorcdbext/stringutils.cpp
+++ b/src/libs/qtcreatorcdbext/stringutils.cpp
@@ -149,7 +149,7 @@ std::string wStringToString(const std::wstring &w)
 }
 
 // Convert an ASCII hex digit to its value 'A'->10
-inline unsigned hexDigit(char c)
+static inline unsigned hexDigit(char c)
 {
     if (c <= '9')
         return c - '0';