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-rw-r--r--cmake/Modules/FindGSL.cmake2
1 files changed, 1 insertions, 1 deletions
diff --git a/cmake/Modules/FindGSL.cmake b/cmake/Modules/FindGSL.cmake
index 116ea9f9e6..60b0d83045 100644
--- a/cmake/Modules/FindGSL.cmake
+++ b/cmake/Modules/FindGSL.cmake
@@ -139,7 +139,7 @@ else( WIN32 AND NOT CYGWIN AND NOT MSYS )
endif( UNIX OR MSYS )
endif( WIN32 AND NOT CYGWIN AND NOT MSYS )
#needed for gsl windows port but safe to always define
-LIST(APPEND GSL_DEFINITIONS "-DGSL_DLL")
+LIST(APPEND GSL_DEFINITIONS "GSL_DLL")
if( GSL_FOUND )
if( NOT GSL_FIND_QUIETLY )