diff --git a/tsl/CMakeLists.txt b/tsl/CMakeLists.txt
index a76c015ea50..2d812829193 100644
--- a/tsl/CMakeLists.txt
+++ b/tsl/CMakeLists.txt
@@ -14,9 +14,8 @@ if(CC_PCLMUL)
   set(CMAKE_REQUIRED_FLAGS -mpclmul)
 endif()
 
-# Detect if we have the needed instructions.
-# Also refer to this link for the proper way of detecting i386:
-# https://wiki.debian.org/X32Port
+# Detect if we have the needed instructions. Also refer to this link for the
+# proper way of detecting i386: https://wiki.debian.org/X32Port
 set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
 check_c_source_compiles(
   "
diff --git a/tsl/src/import/CMakeLists.txt b/tsl/src/import/CMakeLists.txt
index d61b88e2506..b938decf792 100644
--- a/tsl/src/import/CMakeLists.txt
+++ b/tsl/src/import/CMakeLists.txt
@@ -4,9 +4,12 @@ if(USE_UMASH)
   list(APPEND SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/umash.c)
 endif()
 
-# Disable clang-tidy for imported code
-add_library(target_no_static_code_analysis OBJECT ${SOURCES})
-set_target_properties(target_no_static_code_analysis PROPERTIES C_CLANG_TIDY "")
+if(SOURCES)
+  # Disable clang-tidy for imported code
+  add_library(target_no_static_code_analysis OBJECT ${SOURCES})
+  set_target_properties(target_no_static_code_analysis PROPERTIES C_CLANG_TIDY
+                                                                  "")
 
-target_link_libraries(${TSL_LIBRARY_NAME}
-                      $<TARGET_OBJECTS:target_no_static_code_analysis>)
+  target_link_libraries(${TSL_LIBRARY_NAME}
+                        $<TARGET_OBJECTS:target_no_static_code_analysis>)
+endif()