diff --git a/.gitlab/includes/gcc14_pipeline.yml b/.gitlab/includes/gcc14_pipeline.yml
index 6bf1ef3ed..ed25cee39 100644
--- a/.gitlab/includes/gcc14_pipeline.yml
+++ b/.gitlab/includes/gcc14_pipeline.yml
@@ -18,7 +18,8 @@ include:
                  ^stdexec@git.8bc7c7f06fe39831dea6852407ebe7f6be8fa9fd=main \
                  ^fmt@11.0.1"
     CMAKE_FLAGS: "-DPIKA_WITH_CXX_STANDARD=$CXXSTD -DPIKA_WITH_MALLOC=system \
-                  -DPIKA_WITH_STDEXEC=ON -DPIKA_WITH_SPINLOCK_DEADLOCK_DETECTION=ON"
+                  -DPIKA_WITH_STDEXEC=ON -DPIKA_WITH_SPINLOCK_DEADLOCK_DETECTION=ON \
+                  -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON"
 
 gcc14_spack_compiler_image:
   extends: