diff --git a/orx-fcurve/src/commonMain/kotlin/FCurve.kt b/orx-fcurve/src/commonMain/kotlin/FCurve.kt
index 58cffaa6..c67d9801 100644
--- a/orx-fcurve/src/commonMain/kotlin/FCurve.kt
+++ b/orx-fcurve/src/commonMain/kotlin/FCurve.kt
@@ -477,6 +477,9 @@ private fun evaluateFCurveCommands(parts: List<String>): FCurve {
 }
 
 fun fcurve(d: String): FCurve {
+    val constantExpression = d.toDoubleOrNull()
+    if (constantExpression != null) {
+        return FCurve(listOf(Segment2D(Vector2(0.0, constantExpression), Vector2(0.0, constantExpression))))
+    }
     return evaluateFCurveCommands(fCurveCommands(d))
 }
-
diff --git a/orx-fcurve/src/commonTest/kotlin/TestEFCurve.kt b/orx-fcurve/src/commonTest/kotlin/TestEFCurve.kt
index d318bee6..de5bfced 100644
--- a/orx-fcurve/src/commonTest/kotlin/TestEFCurve.kt
+++ b/orx-fcurve/src/commonTest/kotlin/TestEFCurve.kt
@@ -38,4 +38,31 @@ class TestEFCurve {
         val s = fc.sampler()
         assertEquals(0.0,  s(6.0))
     }
+
+    @Test
+    fun testConstantValue() {
+        val text = "10.5"
+        val fc = fcurve(efcurve(text))
+        assertEquals(10.5, fc.value(0.0))
+        assertEquals(10.5, fc.value(1.0))
+        assertEquals(10.5, fc.value(-1.0))
+
+        val normalizedSampler = fc.sampler(true)
+        assertEquals(10.5, normalizedSampler(0.0))
+        assertEquals(10.5, normalizedSampler(1.0))
+        assertEquals(10.5, normalizedSampler(-1.0))
+    }
+    @Test
+    fun testConstantExpression() {
+        val text = "${21.0 / 2.0}"
+        val fc = fcurve(efcurve(text))
+        assertEquals(10.5, fc.value(0.0))
+        assertEquals(10.5, fc.value(1.0))
+        assertEquals(10.5, fc.value(-1.0))
+
+        val normalizedSampler = fc.sampler(true)
+        assertEquals(10.5, normalizedSampler(0.0))
+        assertEquals(10.5, normalizedSampler(1.0))
+        assertEquals(10.5, normalizedSampler(-1.0))
+    }
 }
\ No newline at end of file
diff --git a/orx-fcurve/src/commonTest/kotlin/TestFCurve.kt b/orx-fcurve/src/commonTest/kotlin/TestFCurve.kt
new file mode 100644
index 00000000..291e24fe
--- /dev/null
+++ b/orx-fcurve/src/commonTest/kotlin/TestFCurve.kt
@@ -0,0 +1,19 @@
+import org.openrndr.extra.fcurve.fcurve
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class TestFCurve {
+    @Test
+    fun testConstantExpression() {
+        val text = "10.5"
+        val fc = fcurve(text)
+        assertEquals(10.5, fc.value(0.0))
+        assertEquals(10.5, fc.value(1.0))
+        assertEquals(10.5, fc.value(-1.0))
+
+        val normalizedSampler = fc.sampler(true)
+        assertEquals(10.5, normalizedSampler(0.0))
+        assertEquals(10.5, normalizedSampler(1.0))
+        assertEquals(10.5, normalizedSampler(-1.0))
+    }
+}
\ No newline at end of file