diff --git a/source/blender/blenkernel/intern/mesh_validate.cc b/source/blender/blenkernel/intern/mesh_validate.cc
index f6197e7d6f3..23d339ff391 100644
--- a/source/blender/blenkernel/intern/mesh_validate.cc
+++ b/source/blender/blenkernel/intern/mesh_validate.cc
@@ -1185,7 +1185,7 @@ void strip_loose_faces_corners(Mesh *mesh, blender::BitSpan faces_to_remove)
     }
     else {
       /* If one of the face's corners is invalid, the whole face is invalid! */
-      if (corner_edges.slice(start, size).as_span().contains(INVALID_CORNER_EDGE_MARKER)) {
+      if (corner_edges.slice(start, size).contains(INVALID_CORNER_EDGE_MARKER)) {
         invalid = true;
       }
     }
diff --git a/source/blender/blenlib/BLI_span.hh b/source/blender/blenlib/BLI_span.hh
index 0c316ef7d02..9323a30dfab 100644
--- a/source/blender/blenlib/BLI_span.hh
+++ b/source/blender/blenlib/BLI_span.hh
@@ -709,6 +709,20 @@ template<typename T> class MutableSpan {
     return counter;
   }
 
+  /**
+   * Does a linear search to see of the value is in the array.
+   * Returns true if it is, otherwise false.
+   */
+  constexpr bool contains(const T &value) const
+  {
+    for (const T &element : *this) {
+      if (element == value) {
+        return true;
+      }
+    }
+    return false;
+  }
+
   /**
    * Does a constant time check to see if the pointer points to a value in the referenced array.
    * Return true if it is, otherwise false.
diff --git a/source/blender/blenlib/tests/BLI_span_test.cc b/source/blender/blenlib/tests/BLI_span_test.cc
index 92af8d0704d..2354933e9f4 100644
--- a/source/blender/blenlib/tests/BLI_span_test.cc
+++ b/source/blender/blenlib/tests/BLI_span_test.cc
@@ -168,6 +168,18 @@ TEST(span, Contains)
   EXPECT_FALSE(a_span.contains(8));
 }
 
+TEST(mutable_span, Contains)
+{
+  Vector<int> a = {4, 5, 6, 7};
+  MutableSpan<int> a_span = a;
+  EXPECT_TRUE(a_span.contains(4));
+  EXPECT_TRUE(a_span.contains(5));
+  EXPECT_TRUE(a_span.contains(6));
+  EXPECT_TRUE(a_span.contains(7));
+  EXPECT_FALSE(a_span.contains(3));
+  EXPECT_FALSE(a_span.contains(8));
+}
+
 TEST(span, Count)
 {
   Vector<int> a = {2, 3, 4, 3, 3, 2, 2, 2, 2};
diff --git a/source/blender/editors/curves/intern/curves_ops.cc b/source/blender/editors/curves/intern/curves_ops.cc
index bb711b5439d..70eb12cb36a 100644
--- a/source/blender/editors/curves/intern/curves_ops.cc
+++ b/source/blender/editors/curves/intern/curves_ops.cc
@@ -1364,7 +1364,7 @@ static int exec(bContext *C, wmOperator * /*op*/)
                             [&](const int i) { cyclic.span[i] = !cyclic.span[i]; });
     cyclic.finish();
 
-    if (!cyclic.span.as_span().contains(true)) {
+    if (!cyclic.span.contains(true)) {
       attributes.remove("cyclic");
     }