diff --git a/doc/release-notes.md b/doc/release-notes.md
index c5e3e6826e83b..ee66d33543edd 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -56,9 +56,14 @@ Notable changes
 
 - #29855 psbt: Check non witness utxo outpoint early
 
+### Test
+
+- #30552 test: fix constructor of msg_tx
+
 ### Build
 
 - #30283 upnp: fix build with miniupnpc 2.2.8
+- #30633 Fixes for GCC 15 compatibility
 
 ### CI
 
@@ -73,6 +78,7 @@ Thanks to everyone who directly contributed to this release:
 - Ava Chow
 - Cory Fields
 - Martin Zumsande
+- Matt Whitlock
 - Max Edwards
 - Sebastian Falbesoner
 - willcl-ark
diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
index ea933d1ca8322..72807501d9dc6 100644
--- a/src/chainparamsbase.h
+++ b/src/chainparamsbase.h
@@ -7,6 +7,7 @@
 
 #include <util/chaintype.h>
 
+#include <cstdint>
 #include <memory>
 #include <string>
 
diff --git a/src/node/interface_ui.h b/src/node/interface_ui.h
index 22c241cb78ee7..85c34f583422b 100644
--- a/src/node/interface_ui.h
+++ b/src/node/interface_ui.h
@@ -6,9 +6,10 @@
 #ifndef BITCOIN_NODE_INTERFACE_UI_H
 #define BITCOIN_NODE_INTERFACE_UI_H
 
+#include <cstdint>
 #include <functional>
-#include <memory>
 #include <string>
+#include <vector>
 
 class CBlockIndex;
 enum class SynchronizationState;
diff --git a/src/policy/feerate.h b/src/policy/feerate.h
index 2e5017291489d..d742a43acc707 100644
--- a/src/policy/feerate.h
+++ b/src/policy/feerate.h
@@ -38,10 +38,8 @@ class CFeeRate
 public:
     /** Fee rate of 0 satoshis per kvB */
     CFeeRate() : nSatoshisPerK(0) { }
-    template<typename I>
+    template<std::integral I> // Disallow silent float -> int conversion
     explicit CFeeRate(const I _nSatoshisPerK): nSatoshisPerK(_nSatoshisPerK) {
-        // We've previously had bugs creep in from silent double->int conversion...
-        static_assert(std::is_integral<I>::value, "CFeeRate should be used without floats");
     }
 
     /**
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py
index 1780678de1e5f..dc5f665b6a6f4 100755
--- a/test/functional/test_framework/messages.py
+++ b/test/functional/test_framework/messages.py
@@ -1293,8 +1293,11 @@ class msg_tx:
     __slots__ = ("tx",)
     msgtype = b"tx"
 
-    def __init__(self, tx=CTransaction()):
-        self.tx = tx
+    def __init__(self, tx=None):
+        if tx is None:
+            self.tx = CTransaction()
+        else:
+            self.tx = tx
 
     def deserialize(self, f):
         self.tx.deserialize(f)