diff --git a/overviewer_core/src/primitives/no-fluids.c b/overviewer_core/src/primitives/no-fluids.c
index fe1c704..cb6428a 100644
--- a/overviewer_core/src/primitives/no-fluids.c
+++ b/overviewer_core/src/primitives/no-fluids.c
@@ -24,7 +24,7 @@ no_fluids_start(void *data, RenderState *state, PyObject *support) {
 
 static int
 no_fluids_hidden(void *data, RenderState *state, int x, int y, int z) {
-    return !block_has_property(state->block, FLUID);
+    return block_has_property(state->block, FLUID);
 }
 
 RenderPrimitiveInterface primitive_no_fluids = {