diff --git a/src/sage/algebras/letterplace/free_algebra_element_letterplace.pyx b/src/sage/algebras/letterplace/free_algebra_element_letterplace.pyx
index 2a977b1a513..aa164d6a4ce 100644
--- a/src/sage/algebras/letterplace/free_algebra_element_letterplace.pyx
+++ b/src/sage/algebras/letterplace/free_algebra_element_letterplace.pyx
@@ -17,13 +17,12 @@ AUTHOR:
 # ****************************************************************************
 
 from sage.groups.perm_gps.permgroup_named import CyclicPermutationGroup
-from sage.libs.singular.function import lib, singular_function
+from sage.libs.singular.function import lib
 from sage.rings.polynomial.multi_polynomial_ideal import MPolynomialIdeal
 from cpython.object cimport PyObject_RichCompare
 
 # Define some singular functions
 lib("freegb.lib")
-poly_reduce = singular_function("NF")
 
 #####################
 # Free algebra elements
@@ -695,6 +694,8 @@ cdef class FreeAlgebraElement_letterplace(AlgebraElement):
         bck = (libsingular_options['redTail'], libsingular_options['redSB'])
         libsingular_options['redTail'] = True
         libsingular_options['redSB'] = True
+        from sage.libs.singular.function import singular_function
+        poly_reduce = singular_function("NF")
         poly = poly_reduce(C(self._poly), gI, ring=C,
                            attributes={gI: {"isSB": 1}})
         libsingular_options['redTail'] = bck[0]
diff --git a/src/sage/algebras/letterplace/free_algebra_letterplace.pyx b/src/sage/algebras/letterplace/free_algebra_letterplace.pyx
index 7a57922d24a..10146c36aeb 100644
--- a/src/sage/algebras/letterplace/free_algebra_letterplace.pyx
+++ b/src/sage/algebras/letterplace/free_algebra_letterplace.pyx
@@ -121,7 +121,7 @@ TESTS::
     algebras with different term orderings, yet.
 """
 from sage.rings.polynomial.polynomial_ring_constructor import PolynomialRing
-from sage.libs.singular.function import lib, singular_function
+from sage.libs.singular.function import lib
 from sage.libs.singular.function cimport RingWrap
 from sage.libs.singular.ring cimport singular_ring_delete, singular_ring_reference
 from sage.categories.algebras import Algebras
@@ -132,7 +132,6 @@ from sage.misc.cachefunc import cached_method
 #####################
 # Define some singular functions
 lib("freegb.lib")
-freeAlgebra = singular_function("freeAlgebra")
 
 # unfortunately we cannot set Singular attributes for MPolynomialRing_libsingular
 # Hence, we must constantly work around Letterplace's sanity checks,
@@ -892,6 +891,8 @@ cdef class FreeAlgebra_letterplace_libsingular():
 
     def __cinit__(self, MPolynomialRing_libsingular commutative_ring,
                   int degbound):
+        from sage.libs.singular.function import singular_function
+        freeAlgebra = singular_function("freeAlgebra")
         cdef RingWrap rw = freeAlgebra(commutative_ring, degbound)
         self._lp_ring = singular_ring_reference(rw._ring)
         # `_lp_ring` viewed as `MPolynomialRing_libsingular` with additional
diff --git a/src/sage/algebras/letterplace/letterplace_ideal.pyx b/src/sage/algebras/letterplace/letterplace_ideal.pyx
index 77d0107ba07..33e8a80c039 100644
--- a/src/sage/algebras/letterplace/letterplace_ideal.pyx
+++ b/src/sage/algebras/letterplace/letterplace_ideal.pyx
@@ -41,7 +41,7 @@ AUTHOR:
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 from sage.rings.noncommutative_ideals import Ideal_nc
-from sage.libs.singular.function import lib, singular_function
+from sage.libs.singular.function import lib
 from sage.algebras.letterplace.free_algebra_letterplace cimport FreeAlgebra_letterplace, FreeAlgebra_letterplace_libsingular
 from sage.algebras.letterplace.free_algebra_element_letterplace cimport FreeAlgebraElement_letterplace
 from sage.rings.infinity import Infinity
@@ -49,9 +49,6 @@ from sage.rings.infinity import Infinity
 #####################
 # Define some singular functions
 lib("freegb.lib")
-singular_twostd = singular_function("twostd")
-poly_reduce = singular_function("NF")
-
 
 class LetterplaceIdeal(Ideal_nc):
     """
@@ -321,6 +318,8 @@ class LetterplaceIdeal(Ideal_nc):
         to_L = P.hom(L.gens(), L, check=False)
         from_L = L.hom(P.gens(), P, check=False)
         I = L.ideal([to_L(x._poly) for x in self.__GB.gens()])
+        from sage.libs.singular.function import singular_function
+        singular_twostd = singular_function("twostd")
         gb = singular_twostd(I)
         out = [FreeAlgebraElement_letterplace(A, from_L(X), check=False)
                for X in gb]
@@ -398,6 +397,8 @@ class LetterplaceIdeal(Ideal_nc):
         bck = (libsingular_options['redTail'], libsingular_options['redSB'])
         libsingular_options['redTail'] = True
         libsingular_options['redSB'] = True
+        from sage.libs.singular.function import singular_function
+        poly_reduce = singular_function("NF")
         sI = poly_reduce(sI, gI, ring=C, attributes={gI: {"isSB": 1}})
         libsingular_options['redTail'] = bck[0]
         libsingular_options['redSB'] = bck[1]