diff --git a/CMakeLists.txt b/CMakeLists.txt
index eda77fc8..9aa7f839 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -171,12 +171,12 @@ file (GLOB_RECURSE tests_SOURCES "tests/*.c" "tests/*.cpp")
 
 # conditionally disable tests when features aren't available
 macro (cond_disable_test name)
-	if ((NOT DEFINED ${HAVE_${name}}) OR (NOT ${HAVE_${name}}))
+	if ((NOT DEFINED HAVE_${name}) OR (NOT HAVE_${name}))
 		message (STATUS "${name} test disabled, since ${name} is not found.")
 		string (TOLOWER "${name}" name_lower)
 		get_filename_component (test_${name}_FILE "tests/test_${name_lower}.cpp" ABSOLUTE)
 		list (REMOVE_ITEM tests_SOURCES "${test_${name}_FILE}")
-	endif ((NOT DEFINED ${HAVE_${name}}) OR (NOT ${HAVE_${name}}))
+	endif ((NOT DEFINED HAVE_${name}) OR (NOT HAVE_${name}))
 endmacro (cond_disable_test name)
 cond_disable_test ("AGMG")
 cond_disable_test ("ERT")