diff --git a/src/app-utils/c-interface.scm b/src/app-utils/c-interface.scm
index 10837a4c64..548e3bb5ae 100644
--- a/src/app-utils/c-interface.scm
+++ b/src/app-utils/c-interface.scm
@@ -15,7 +15,6 @@
 ;; 51 Franklin Street, Fifth Floor    Fax:    +1-617-542-2652
 ;; Boston, MA  02110-1301,  USA       gnu@gnu.org
 
-(use-modules (ice-9 slib))
 (use-modules (ice-9 syncase))
 
 (define (gnc:error->string tag args)
diff --git a/src/report/business-reports/aging.scm b/src/report/business-reports/aging.scm
index 60beb9e028..6047baa53a 100644
--- a/src/report/business-reports/aging.scm
+++ b/src/report/business-reports/aging.scm
@@ -26,7 +26,6 @@
 
 (define-module (gnucash report aging))
 
-(use-modules (ice-9 slib))
 (use-modules (gnucash main))
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
diff --git a/src/report/business-reports/easy-invoice.scm b/src/report/business-reports/easy-invoice.scm
index 13e0adbd19..10d74e332e 100644
--- a/src/report/business-reports/easy-invoice.scm
+++ b/src/report/business-reports/easy-invoice.scm
@@ -31,7 +31,6 @@
 (define-module (gnucash report easy-invoice))
 
 (use-modules (srfi srfi-1))
-(use-modules (ice-9 slib))
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
diff --git a/src/report/business-reports/fancy-invoice.scm b/src/report/business-reports/fancy-invoice.scm
index 344c9b5334..f6563c18de 100644
--- a/src/report/business-reports/fancy-invoice.scm
+++ b/src/report/business-reports/fancy-invoice.scm
@@ -49,7 +49,6 @@
 (define-module (gnucash report fancy-invoice))
 
 (use-modules (srfi srfi-1))
-(use-modules (ice-9 slib))
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
diff --git a/src/report/business-reports/invoice.scm b/src/report/business-reports/invoice.scm
index 32cf0624ee..5e7ca8689d 100644
--- a/src/report/business-reports/invoice.scm
+++ b/src/report/business-reports/invoice.scm
@@ -25,7 +25,6 @@
 (define-module (gnucash report invoice))
 
 (use-modules (srfi srfi-1))
-(use-modules (ice-9 slib))
 (use-modules (gnucash printf))
 (use-modules (gnucash gnc-module))
 
diff --git a/src/report/report-system/report-system.scm b/src/report/report-system/report-system.scm
index aaa1a3e4c9..ca11ae2b50 100644
--- a/src/report/report-system/report-system.scm
+++ b/src/report/report-system/report-system.scm
@@ -7,7 +7,6 @@
 
 (define-module (gnucash report report-system))
 (use-modules (gnucash main)) ;; FIXME: delete after we finish modularizing.
-(use-modules (ice-9 slib))
 (use-modules (ice-9 regex))
 (use-modules (srfi srfi-1))
 (use-modules (srfi srfi-19))
diff --git a/src/report/standard-reports/standard-reports.scm b/src/report/standard-reports/standard-reports.scm
index d30b9a35fa..c51eea78ee 100644
--- a/src/report/standard-reports/standard-reports.scm
+++ b/src/report/standard-reports/standard-reports.scm
@@ -6,7 +6,6 @@
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 (define-module (gnucash report standard-reports))
-(use-modules (ice-9 slib))
 (use-modules (srfi srfi-13))
 (use-modules (gnucash main)) ;; FIXME: delete after we finish modularizing.
 (use-modules (gnucash core-utils))