diff --git a/lib/config/configcompiler.cpp b/lib/config/configcompiler.cpp
index 6b5f3a3ca..1f56306c1 100644
--- a/lib/config/configcompiler.cpp
+++ b/lib/config/configcompiler.cpp
@@ -27,7 +27,7 @@
 #include <fstream>
 
 #ifdef _WIN32
-#include "Shlwapi.h"
+#	include <shlwapi.h>
 #endif /* _WIN32 */
 
 using namespace icinga;
@@ -354,3 +354,14 @@ bool ConfigCompiler::HasZoneConfigAuthority(const String& zoneName)
 
 	return !empty;
 }
+
+
+bool ConfigCompiler::IsAbsolutePath(const String& path)
+{
+#ifndef _WIN32
+	return (path.GetLength() > 0 && path[0] == '/');
+#else /* _WIN32 */
+	return !PathIsRelative(path.CStr());
+#endif /* _WIN32 */
+}
+
diff --git a/lib/config/configcompiler.hpp b/lib/config/configcompiler.hpp
index 472fa2330..94ae967bd 100644
--- a/lib/config/configcompiler.hpp
+++ b/lib/config/configcompiler.hpp
@@ -127,14 +127,6 @@ public:
 
 	static bool HasZoneConfigAuthority(const String& zoneName);
 
-	static inline bool IsAbsolutePath(const String& path) {
-#ifndef _WIN32
-		return (path.GetLength() > 0 && path[0] == '/');
-#else
-		return !PathIsRelative(path.CStr());
-#endif /* _WIN32 */
-	}
-
 private:
 	boost::promise<boost::shared_ptr<Expression> > m_Promise;
 
@@ -154,6 +146,8 @@ private:
 
 	static void HandleIncludeZone(const String& relativeBase, const String& tag, const String& path, const String& pattern, const String& package, std::vector<Expression *>& expressions);
 
+	static bool IsAbsolutePath(const String& path);
+
 public:
 	bool m_Eof;
 	int m_OpenBraces;