diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index 9f9cc9e254f..f0e7732e635 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -615,6 +615,7 @@ nvc0_screen_get_compute_param(struct pipe_screen *pscreen,
                               enum pipe_compute_cap param, void *data)
 {
    struct nvc0_screen *screen = nvc0_screen(pscreen);
+   struct nouveau_device *dev = screen->base.device;
    const uint16_t obj_class = screen->compute->oclass;
 
 #define RET(x) do {                  \
@@ -643,7 +644,7 @@ nvc0_screen_get_compute_param(struct pipe_screen *pscreen,
          RET((uint64_t []) { 512 });
       }
    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE: /* g[] */
-      RET((uint64_t []) { 1ULL << 40 });
+      RET((uint64_t []) { nouveau_device_get_global_mem_size(dev) });
    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE: /* s[] */
       switch (obj_class) {
       case GM200_COMPUTE_CLASS:
@@ -660,7 +661,7 @@ nvc0_screen_get_compute_param(struct pipe_screen *pscreen,
    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
       RET((uint32_t []) { 32 });
    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
-      RET((uint64_t []) { 1ULL << 40 });
+      RET((uint64_t []) { nouveau_device_get_global_mem_size(dev) });
    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
       RET((uint32_t []) { NVC0_MAX_IMAGES });
    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS: