diff --git a/hebi/CMakeLists.txt b/hebi/CMakeLists.txt
index 8253566..5cb698a 100644
--- a/hebi/CMakeLists.txt
+++ b/hebi/CMakeLists.txt
@@ -18,9 +18,9 @@ if (UNIX AND NOT APPLE)
   # Detect cross-compilation, especially on the ROS build farm:
   if (${CMAKE_LIBRARY_ARCHITECTURE} MATCHES "^i[3456]86-linux-gnu$")
     set(LIBHEBI_TARGET_ARCHITECTURE "i686")
-  elseif ("arm-linux-gnueabihf" STREQUAL ${CMAKE_LIBRARY_ARCHITECTURE})
+  elseif ("arm-linux-gnueabihf" STREQUAL "${CMAKE_LIBRARY_ARCHITECTURE}")
     set(LIBHEBI_TARGET_ARCHITECTURE "armhf")
-  elseif ("aarch64-linux-gnu" STREQUAL ${CMAKE_LIBRARY_ARCHITECTURE})
+  elseif ("aarch64-linux-gnu" STREQUAL "${CMAKE_LIBRARY_ARCHITECTURE}")
     set(LIBHEBI_TARGET_ARCHITECTURE "aarch64")
   endif()