diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index 96f22da6b2..864237ed31 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -108,9 +108,9 @@ if(NOT OPENMW_USE_SYSTEM_OSG)
     set(BUILD_OSG_PLUGIN_PNG ON CACHE BOOL "")
     set(BUILD_OSG_PLUGIN_TGA ON CACHE BOOL "")
 
-    set(OSG_USE_FLOAT_MATRIX ON CACHE BOOL "")
-    set(OSG_USE_FLOAT_PLANE ON CACHE BOOL "")
-    set(OSG_USE_FLOAT_QUAT ON CACHE BOOL "")
+    set(OSG_USE_FLOAT_MATRIX OFF CACHE BOOL "")
+    set(OSG_USE_FLOAT_PLANE OFF CACHE BOOL "")
+    set(OSG_USE_FLOAT_QUAT OFF CACHE BOOL "")
 
     set(OPENGL_PROFILE "GL2" CACHE STRING "")