diff --git a/all.sas b/all.sas
index 95e1cfa..37513bc 100644
--- a/all.sas
+++ b/all.sas
@@ -188,7 +188,7 @@ options noquotelenmax;
     %put No feature was requested for detection;
   %end;
   %else %if &feature=COLCONSTRAINTS %then %do;
-    %if %substr(&sysver,1,1)=4 %then 0;
+    %if "%substr(&sysver,1,1)"="4" or "%substr(&sysver,1,1)"="5" %then 0;
     %else 1;
   %end;
   %else %if &feature=PROCLUA %then %do;
diff --git a/base/mf_existfeature.sas b/base/mf_existfeature.sas
index 739b5e7..0d7afab 100644
--- a/base/mf_existfeature.sas
+++ b/base/mf_existfeature.sas
@@ -30,7 +30,7 @@
     %put No feature was requested for detection;
   %end;
   %else %if &feature=COLCONSTRAINTS %then %do;
-    %if %substr(&sysver,1,1)=4 %then 0;
+    %if "%substr(&sysver,1,1)"="4" or "%substr(&sysver,1,1)"="5" %then 0;
     %else 1;
   %end;
   %else %if &feature=PROCLUA %then %do;