diff --git a/src/lib/icu/Init.cxx b/src/lib/icu/Init.cxx
index 4296bde42..e7d1853bd 100644
--- a/src/lib/icu/Init.cxx
+++ b/src/lib/icu/Init.cxx
@@ -37,7 +37,7 @@ IcuInit()
 }
 
 void
-IcuFinish()
+IcuFinish() noexcept
 {
 	IcuCollateFinish();
 
diff --git a/src/lib/icu/Init.hxx b/src/lib/icu/Init.hxx
index 63c0b417c..95646e314 100644
--- a/src/lib/icu/Init.hxx
+++ b/src/lib/icu/Init.hxx
@@ -28,12 +28,12 @@ void
 IcuInit();
 
 void
-IcuFinish();
+IcuFinish() noexcept;
 
 #else
 
-static inline void IcuInit() {}
-static inline void IcuFinish() {}
+static inline void IcuInit() noexcept {}
+static inline void IcuFinish() noexcept {}
 
 #endif