diff --git a/CMakeLists.txt b/CMakeLists.txt
index 418afae..2ee0339 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -389,7 +389,7 @@ if(CPPTRACE_UNWIND_WITH_LIBUNWIND)
   if(NOT libunwind_FOUND)
     # set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS ON)
     # set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS ON)
-		find_path(LIBUNWIND_INCLUDE_DIR NAMES "libunwind.h")
+    find_path(LIBUNWIND_INCLUDE_DIRS NAMES "libunwind.h")
     find_library(LIBUNWIND NAMES unwind libunwind libunwind8 libunwind.so.8 REQUIRED PATHS "/usr/lib/x86_64-linux-gnu/")
     if(LIBUNWIND)
       set(libunwind_FOUND TRUE)