diff --git a/htdocs/core/lib/images.lib.php b/htdocs/core/lib/images.lib.php
index 7dea7357535..4e0a8e86789 100644
--- a/htdocs/core/lib/images.lib.php
+++ b/htdocs/core/lib/images.lib.php
@@ -274,7 +274,7 @@ function dol_imageResizeOrCrop($file, $mode, $newWidth, $newHeight, $src_x=0, $s
 			imagepng($imgThumb, $imgThumbName, $newquality);
 			break;
 		case 4:	// Bmp
-			image2wmp($imgThumb, $imgThumbName);
+			image2wbmp($imgThumb, $imgThumbName);
 			break;
 	}
 
@@ -534,7 +534,7 @@ function vignette($file, $maxWidth = 160, $maxHeight = 120, $extName='_small', $
             // Not supported by PHP GD
 			break;
 		case IMAGETYPE_WBMP:    // 15
-			image2wmp($imgThumb, $imgThumbName);
+			image2wbmp($imgThumb, $imgThumbName);
 			break;
 	}