diff --git a/extensions/common/pbo/search.cpp b/extensions/common/pbo/search.cpp
index 3b9ebfe18b..d4e3ef53b0 100644
--- a/extensions/common/pbo/search.cpp
+++ b/extensions/common/pbo/search.cpp
@@ -97,7 +97,7 @@ typedef struct _OBJECT_TYPE_INFORMATION
     ULONG NonPagedPoolUsage;
 } OBJECT_TYPE_INFORMATION, *POBJECT_TYPE_INFORMATION;
 
-PVOID GetLibraryProcAddress(PSTR LibraryName, PSTR ProcName)
+PVOID GetLibraryProcAddress(LPCSTR LibraryName, LPCSTR ProcName)
 {
     return GetProcAddress(GetModuleHandleA(LibraryName), ProcName);
 }