diff --git a/src/ipa/raspberrypi/raspberrypi.cpp b/src/ipa/raspberrypi/raspberrypi.cpp
index fed82e22..8ffb7092 100644
--- a/src/ipa/raspberrypi/raspberrypi.cpp
+++ b/src/ipa/raspberrypi/raspberrypi.cpp
@@ -61,7 +61,7 @@ using utils::Duration;
 /* Configure the sensor with these values initially. */
 constexpr double defaultAnalogueGain = 1.0;
 constexpr Duration defaultExposureTime = 20.0ms;
-constexpr Duration defaultMinFrameDuration = 1.0s / 30.0;
+Duration defaultMinFrameDuration = 1.0s / 30.0;
 constexpr Duration defaultMaxFrameDuration = 250.0s;
 
 /*
@@ -70,7 +70,7 @@ constexpr Duration defaultMaxFrameDuration = 250.0s;
  * we rate-limit the controller Prepare() and Process() calls to lower than or
  * equal to this rate.
  */
-constexpr Duration controllerMinFrameDuration = 1.0s / 60.0;
+Duration controllerMinFrameDuration = 1.0s / 60.0;
 
 LOG_DEFINE_CATEGORY(IPARPI)