diff --git a/perl-Config-AutoConf.spec b/perl-Config-AutoConf.spec
index 3007052..3882444 100644
--- a/perl-Config-AutoConf.spec
+++ b/perl-Config-AutoConf.spec
@@ -1,5 +1,7 @@
 # Use File::Slurper for reading file content
 %bcond_without perl_Config_AutoConf_enables_File_Slurper
+# Use Scalar::Util for detecting numbers
+%bcond_without perl_Config_AutoConf_enables_Scalar_Util
 
 Name:           perl-Config-AutoConf
 Version:        0.319
@@ -30,6 +32,9 @@ BuildRequires:  perl(File::Slurper)
 %endif
 BuildRequires:  perl(File::Spec)
 BuildRequires:  perl(File::Temp)
+%if %{with perl_Config_AutoConf_enables_Scalar_Util}
+BuildRequires:  perl(Scalar::Util) >= 1.18
+%endif
 BuildRequires:  perl(Text::ParseWords)
 # Tests only
 BuildRequires:  perl(Cwd)
@@ -40,6 +45,9 @@ Requires:       perl(:MODULE_COMPAT_%(eval "$(/usr/bin/perl -V:version)"; echo $
 %if %{with perl_Config_AutoConf_enables_File_Slurper}
 Suggests:       perl(File::Slurper)
 %endif
+%if %{with perl_Config_AutoConf_enables_Scalar_Util}
+Suggests:       perl(Scalar::Util) >= 1.18
+%endif
 
 %description
 This module simulates some of the tasks autoconf macros do.  To detect
@@ -67,6 +75,7 @@ a command, a library and similar.
 %changelog
 * Tue Jan 12 2021 Petr Pisar <ppisar@redhat.com> - 0.319-2
 - Suggest File::Slurper for reading file content
+- Suggest Scalar::Util for detecting numbers
 
 * Sun Oct 04 2020 Emmanuel Seyman <emmanuel@seyman.fr> - 0.319-1
 - Update to 0.319