diff --git a/src/sage/groups/perm_gps/partn_ref/data_structures.pxd b/src/sage/groups/perm_gps/partn_ref/data_structures.pxd
index a839493932b..ecf244607d1 100644
--- a/src/sage/groups/perm_gps/partn_ref/data_structures.pxd
+++ b/src/sage/groups/perm_gps/partn_ref/data_structures.pxd
@@ -144,28 +144,28 @@ cdef inline void OP_make_set(OrbitPartition *OP) noexcept:
     cdef int *int_array = <int *> sig_malloc(4*(n+1) * sizeof(int))
     if int_array is NULL:
         raise MemoryError("MemoryError allocating int_array in make_set method")
-    else:
-        OP.degree = n + 1
-        OP.num_cells = OP.num_cells + 1
-        new_parent = int_array
-        new_rank = int_array + (n + 1)
-        new_mcr = int_array + (2*n + 2)
-        new_size = int_array + (3 * n + 3)
-
-        memcpy(new_parent, OP.parent, n * sizeof(int))
-        memcpy(new_rank, OP.rank, n * sizeof(int))
-        memcpy(new_mcr, OP.mcr, n * sizeof(int))
-        memcpy(new_size, OP.size, n * sizeof(int))
-
-        new_parent[n] = n
-        new_rank[n] = 0
-        new_mcr[n] = n
-        new_size[n] = 1
-
-        OP.parent = new_parent
-        OP.rank = new_rank
-        OP.mcr = new_mcr
-        OP.size = new_size
+
+    OP.degree = n + 1
+    OP.num_cells = OP.num_cells + 1
+    new_parent = int_array
+    new_rank = int_array + (n + 1)
+    new_mcr = int_array + (2*n + 2)
+    new_size = int_array + (3 * n + 3)
+
+    memcpy(new_parent, OP.parent, n * sizeof(int))
+    memcpy(new_rank, OP.rank, n * sizeof(int))
+    memcpy(new_mcr, OP.mcr, n * sizeof(int))
+    memcpy(new_size, OP.size, n * sizeof(int))
+
+    new_parent[n] = n
+    new_rank[n] = 0
+    new_mcr[n] = n
+    new_size[n] = 1
+
+    OP.parent = new_parent
+    OP.rank = new_rank
+    OP.mcr = new_mcr
+    OP.size = new_size
 
 cdef inline int OP_merge_list_perm(OrbitPartition *OP, int *gamma) noexcept:
     """