diff --git a/simgear/scene/viewer/CompositorBuffer.cxx b/simgear/scene/viewer/CompositorBuffer.cxx
index a8cd2209..869cf12d 100644
--- a/simgear/scene/viewer/CompositorBuffer.cxx
+++ b/simgear/scene/viewer/CompositorBuffer.cxx
@@ -53,8 +53,7 @@ PropStringMap<BufferFormat> buffer_format_map {
     {"rg16f", {GL_RG16F, GL_RG, GL_FLOAT}},
     {"rg32f", {GL_RG32F, GL_RG, GL_FLOAT}},
     {"depth16", {GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT}},
-    {"depth24", {GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT, GL_FLOAT}},
-    {"depth32", {GL_DEPTH_COMPONENT32, GL_DEPTH_COMPONENT, GL_FLOAT}},
+    {"depth24", {GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT}},
     {"depth32f", {GL_DEPTH_COMPONENT32F, GL_DEPTH_COMPONENT, GL_FLOAT}},
     {"depth-stencil", { GL_DEPTH24_STENCIL8_EXT, GL_DEPTH_STENCIL_EXT, GL_FLOAT}}
 };