diff --git a/src/ipa/ipu3/ipa_context.cpp b/src/ipa/ipu3/ipa_context.cpp
index fe455e071..3b22f7917 100644
--- a/src/ipa/ipu3/ipa_context.cpp
+++ b/src/ipa/ipu3/ipa_context.cpp
@@ -39,6 +39,10 @@ namespace libcamera::ipa::ipu3 {
  * \struct IPAContext
  * \brief Global IPA context data shared between all algorithms
  *
+ * \fn IPAContext::IPAContext
+ * \brief Initialize the instance with the given number of frame contexts
+ * \param[in] frameContextSize Size of the frame context ring buffer
+ *
  * \var IPAContext::configuration
  * \brief The IPA session configuration, immutable during the session
  *
diff --git a/src/ipa/ipu3/ipa_context.h b/src/ipa/ipu3/ipa_context.h
index 29f38b36a..97fcf06cd 100644
--- a/src/ipa/ipu3/ipa_context.h
+++ b/src/ipa/ipu3/ipa_context.h
@@ -84,6 +84,11 @@ struct IPAFrameContext : public FrameContext {
 };
 
 struct IPAContext {
+	IPAContext(unsigned int frameContextSize)
+		: frameContexts(frameContextSize)
+	{
+	}
+
 	IPASessionConfiguration configuration;
 	IPAActiveState activeState;
 
diff --git a/src/ipa/ipu3/ipu3.cpp b/src/ipa/ipu3/ipu3.cpp
index 44c98cbf6..1cae08bf2 100644
--- a/src/ipa/ipu3/ipu3.cpp
+++ b/src/ipa/ipu3/ipu3.cpp
@@ -187,7 +187,7 @@ private:
 };
 
 IPAIPU3::IPAIPU3()
-	: context_({ {}, {}, { kMaxFrameContexts }, {} })
+	: context_(kMaxFrameContexts)
 {
 }