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-rw-r--r--cmake/EigenTesting.cmake2
1 files changed, 1 insertions, 1 deletions
diff --git a/cmake/EigenTesting.cmake b/cmake/EigenTesting.cmake
index d3102d929..629880e8f 100644
--- a/cmake/EigenTesting.cmake
+++ b/cmake/EigenTesting.cmake
@@ -1,7 +1,7 @@
macro(ei_add_property prop value)
get_property(previous GLOBAL PROPERTY ${prop})
- if (NOT ${previous} OR ${previous} STREQUAL "")
+ if ((NOT previous) OR (previous STREQUAL ""))
set_property(GLOBAL PROPERTY ${prop} "${value}")
else()
set_property(GLOBAL PROPERTY ${prop} "${previous} ${value}")