diff --git a/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp b/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp
index 93505f3da45..af50fcc1425 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp
+++ b/src/gallium/auxiliary/gallivm/lp_bld_debug.cpp
@@ -81,8 +81,12 @@ lp_check_alignment(const void *ptr, unsigned alignment)
 class raw_debug_ostream :
    public llvm::raw_ostream
 {
+private:
    uint64_t pos;
 
+public:
+   raw_debug_ostream() : pos(0) { }
+
    void write_impl(const char *Ptr, size_t Size);
 
 #if HAVE_LLVM >= 0x207