diff --git a/indra/llmath/llvector4a.h b/indra/llmath/llvector4a.h
index 94a61f2b1dcb08f70b72ef66b2340e0ab35bde41..79d0a44551a607f9ca0d8edcfb39dc0054761999 100755
--- a/indra/llmath/llvector4a.h
+++ b/indra/llmath/llvector4a.h
@@ -46,6 +46,7 @@ class LLRotation;
 // of this writing, July 08, 2010) about getting it implemented before you resort to
 // LLVector3/LLVector4. 
 /////////////////////////////////
+class LLVector4a;
 
 LL_ALIGN_PREFIX(16)
 class LLVector4a
@@ -239,7 +240,7 @@ public:
 	// Normalize this vector with respect to the x, y, and z components only. Accurate only to 10-12 bits of precision. W component is destroyed
 	// Same as above except substitutes default vector contents if the vector is non-finite or degenerate due to zero length.
 	//
-	inline void normalize3fast_checked(LLVector4a* default = NULL);
+	inline void normalize3fast_checked(LLVector4a* d = 0);
 
 	// Return true if this vector is normalized with respect to x,y,z up to tolerance
 	inline LLBool32 isNormalized3( F32 tolerance = 1e-3 ) const;
diff --git a/indra/llmath/llvector4a.inl b/indra/llmath/llvector4a.inl
index 6860252a75894fc8e672bad616bb640400d6460c..d3e8a1c933d189a9f513592fe72cf10b89dc9119 100755
--- a/indra/llmath/llvector4a.inl
+++ b/indra/llmath/llvector4a.inl
@@ -417,14 +417,14 @@ inline void LLVector4a::normalize3fast()
 
 // Normalize this vector with respect to the x, y, and z components only. Accurate only to 10-12 bits of precision. W component is destroyed
 // Note that this does not consider zero length vectors!
-inline void LLVector4a::normalize3fast_checked(LLVector4a* default)
+inline void LLVector4a::normalize3fast_checked(LLVector4a* d)
 {
 	// handle bogus inputs before NaNs are generated below
 	//
 	if (!isFinite3() || (dot3(*this).getF32() < F_APPROXIMATELY_ZERO))
 	{
-		if (default)
-			*this = *default;
+		if (d)
+			*this = *d;
 		else
 			set(0,1,0,1);