diff --git a/src/hotspot/share/gc/g1/g1_globals.hpp b/src/hotspot/share/gc/g1/g1_globals.hpp
index 0cdb045dd8f..c1fa9c7a744 100644
--- a/src/hotspot/share/gc/g1/g1_globals.hpp
+++ b/src/hotspot/share/gc/g1/g1_globals.hpp
@@ -309,7 +309,7 @@
           "disables this check.")                                           \
           range(0.0, (double)max_uintx)                                     \
                                                                             \
-  product(bool, G1UsePreventiveGC, true, DIAGNOSTIC,                        \
+  product(bool, G1UsePreventiveGC, false, DIAGNOSTIC,                       \
           "Allows collections to be triggered proactively based on the      \
            number of free regions and the expected survival rates in each   \
            section of the heap.")