diff --git a/d4tools/src/create/main.rs b/d4tools/src/create/main.rs
index 0fdb1a5..8d771b1 100644
--- a/d4tools/src/create/main.rs
+++ b/d4tools/src/create/main.rs
@@ -257,6 +257,7 @@ impl CreateAppCtx {
 
     fn determine_default_denominator(&mut self, matches: &ArgMatches) -> Result<(), DynErr> {
         if self.denominator.is_some() {
+            self.builder.set_denominator(self.denominator.unwrap());
             return Ok(());
         }
 
diff --git a/d4tools/test/create/fractional-bedgraph-fixed-denominator/cmdline b/d4tools/test/create/fractional-bedgraph-fixed-denominator/cmdline
new file mode 100644
index 0000000..8f1e3b8
--- /dev/null
+++ b/d4tools/test/create/fractional-bedgraph-fixed-denominator/cmdline
@@ -0,0 +1,2 @@
+${D4TOOLS} create --denominator 100 -g genome.size input.bedgraph ${OUTDIR}/out.d4 && \
+		${D4TOOLS} view ${OUTDIR}/out.d4
diff --git a/d4tools/test/create/fractional-bedgraph-fixed-denominator/genome.size b/d4tools/test/create/fractional-bedgraph-fixed-denominator/genome.size
new file mode 100644
index 0000000..7c19d95
--- /dev/null
+++ b/d4tools/test/create/fractional-bedgraph-fixed-denominator/genome.size
@@ -0,0 +1,2 @@
+chr1	1000
+chr2	1000
diff --git a/d4tools/test/create/fractional-bedgraph-fixed-denominator/input.bedgraph b/d4tools/test/create/fractional-bedgraph-fixed-denominator/input.bedgraph
new file mode 100644
index 0000000..809b228
--- /dev/null
+++ b/d4tools/test/create/fractional-bedgraph-fixed-denominator/input.bedgraph
@@ -0,0 +1,2 @@
+chr1	100	200	0.2
+chr2	300	400	10.8
diff --git a/d4tools/test/create/fractional-bedgraph-fixed-denominator/output.txt b/d4tools/test/create/fractional-bedgraph-fixed-denominator/output.txt
new file mode 100644
index 0000000..126fa46
--- /dev/null
+++ b/d4tools/test/create/fractional-bedgraph-fixed-denominator/output.txt
@@ -0,0 +1,6 @@
+chr1	0	100	0
+chr1	100	200	0.2
+chr1	200	1000	0
+chr2	0	300	0
+chr2	300	400	10.8
+chr2	400	1000	0