diff --git a/libraries/shared/src/GLMHelpers.cpp b/libraries/shared/src/GLMHelpers.cpp
index e6fbe5e5cc..257ef2f00e 100644
--- a/libraries/shared/src/GLMHelpers.cpp
+++ b/libraries/shared/src/GLMHelpers.cpp
@@ -285,7 +285,14 @@ glm::quat glmExtractRotation(const glm::mat4& matrix) {
 }
 
 glm::vec3 extractScale(const glm::mat4& matrix) {
-    return glm::vec3(glm::length(matrix[0]), glm::length(matrix[1]), glm::length(matrix[2]));
+    glm::mat3 m(matrix);
+    float det = glm::determinant(m);
+    if (det < 0) {
+        // left handed matrix, flip sign to compensate.
+        return glm::vec3(-glm::length(m[0]), glm::length(m[1]), glm::length(m[2]));
+    } else {
+        return glm::vec3(glm::length(m[0]), glm::length(m[1]), glm::length(m[2]));
+    }
 }
 
 float extractUniformScale(const glm::mat4& matrix) {