diff --git a/CMakeLists.txt b/CMakeLists.txt
index 12ea7c3b..7b509fa8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -152,13 +152,18 @@ set(SPDLOG_BUILD_BENCH
     CACHE BOOL "" FORCE)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 add_subdirectory(3rdparty/spdlog)
-# Hide spdlog symbols from other libraries to avoid symbol conflicts
-target_compile_options(spdlog PRIVATE -fvisibility=hidden
-                                      -fvisibility-inlines-hidden)
+# Hide spdlog symbols to avoid cross-library symbol collisions. Both rocroller
+# (via hipblaslt/TE) and MORI statically link spdlog; if both export spdlog
+# symbols, MORI's spdlog calls can be interposed by rocroller's copy, causing
+# heap corruption (free(): invalid size). Using the compiled spdlog library (not
+# header-only) with hidden visibility ensures spdlog symbols stay internal to
+# MORI's .so files.
+set_target_properties(spdlog PROPERTIES CXX_VISIBILITY_PRESET hidden
+                                        VISIBILITY_INLINES_HIDDEN ON)
 
 add_library(mori_logging INTERFACE)
 target_include_directories(mori_logging INTERFACE include)
-target_link_libraries(mori_logging INTERFACE spdlog::spdlog_header_only)
+target_link_libraries(mori_logging INTERFACE spdlog::spdlog)
 
 if(ENABLE_PROFILER)
   find_package(