diff --git a/libraries/ZVulkan/src/glslang/glslang/ResourceLimits/resource_limits_c.cpp b/libraries/ZVulkan/src/glslang/glslang/ResourceLimits/resource_limits_c.cpp
index 7bc4594d2..7b1e20f5b 100644
--- a/libraries/ZVulkan/src/glslang/glslang/ResourceLimits/resource_limits_c.cpp
+++ b/libraries/ZVulkan/src/glslang/glslang/ResourceLimits/resource_limits_c.cpp
@@ -26,7 +26,9 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 **/
 
+#ifndef _CRT_SECURE_NO_WARNINGS
 #define _CRT_SECURE_NO_WARNINGS
+#endif
 
 #include "../Public/resource_limits_c.h"
 #include "../Public/ResourceLimits.h"