diff --git a/facefusion/vision.py b/facefusion/vision.py
index f5a0bf7..5445b91 100644
--- a/facefusion/vision.py
+++ b/facefusion/vision.py
@@ -273,8 +273,8 @@ def equalize_frame_color(source_vision_frame : VisionFrame, target_vision_frame
 def calc_histogram_difference(source_vision_frame : VisionFrame, target_vision_frame : VisionFrame) -> float:
 	histogram_source = cv2.calcHist([cv2.cvtColor(source_vision_frame, cv2.COLOR_BGR2HSV)], [ 0, 1 ], None, [ 50, 60 ], [ 0, 180, 0, 256 ])
 	histogram_target = cv2.calcHist([cv2.cvtColor(target_vision_frame, cv2.COLOR_BGR2HSV)], [ 0, 1 ], None, [ 50, 60 ], [ 0, 180, 0, 256 ])
-	histogram_differnce = float(numpy.interp(cv2.compareHist(histogram_source, histogram_target, cv2.HISTCMP_CORREL), [ -1, 1 ], [ 0, 1 ]))
-	return histogram_differnce
+	histogram_difference = float(numpy.interp(cv2.compareHist(histogram_source, histogram_target, cv2.HISTCMP_CORREL), [ -1, 1 ], [ 0, 1 ]))
+	return histogram_difference
 
 
 def blend_vision_frames(source_vision_frame : VisionFrame, target_vision_frame : VisionFrame, blend_factor : float) -> VisionFrame: