diff --git a/src/libImaging/Histo.c b/src/libImaging/Histo.c
index 5ef72e6d3..923fa28d5 100644
--- a/src/libImaging/Histo.c
+++ b/src/libImaging/Histo.c
@@ -45,7 +45,7 @@ ImagingHistogramNew(Imaging im)
     /* Create histogram descriptor */
     h = calloc(1, sizeof(struct ImagingHistogramInstance));
     if (h == NULL) {
-        return NULL;
+        return (ImagingHistogram) ImagingError_MemoryError();
     }
     strncpy(h->mode, im->mode, IMAGING_MODE_LENGTH-1);
     h->mode[IMAGING_MODE_LENGTH-1] = 0;