diff --git a/ground/gcs/src/libs/osgearth/copydata.pro b/ground/gcs/src/libs/osgearth/copydata.pro
index 85e77482c..bd93a4fe1 100644
--- a/ground/gcs/src/libs/osgearth/copydata.pro
+++ b/ground/gcs/src/libs/osgearth/copydata.pro
@@ -9,10 +9,10 @@ equals(copyosg, 1) {
         # copy osg libraries
 
         data_copy.commands += $(MKDIR) $${GCS_LIBRARY_PATH}/osg $$addNewline()
-        exists( $${OSG_SDK_DIR}/lib64 ) {
+        *-64 {
             data_copy.commands += $(COPY_DIR) $$shell_quote($$OSG_SDK_DIR/lib64/)* $$shell_quote($$GCS_LIBRARY_PATH/osg/)
         }
-        else {
+        *-32 {
             data_copy.commands += $(COPY_DIR) $$shell_quote($$OSG_SDK_DIR/lib/)* $$shell_quote($$GCS_LIBRARY_PATH/osg/)
         }