diff --git a/src/broadcom/simulator/v3d_simulator.c b/src/broadcom/simulator/v3d_simulator.c
index fa99750190f..a6a057d80f0 100644
--- a/src/broadcom/simulator/v3d_simulator.c
+++ b/src/broadcom/simulator/v3d_simulator.c
@@ -79,7 +79,7 @@ static struct v3d_simulator_state {
         /* Base hardware address of the heap. */
         uint32_t mem_base;
         /* Size of the heap. */
-        size_t mem_size;
+        uint32_t mem_size;
 
         struct mem_block *heap;
         struct mem_block *overflow;
diff --git a/src/broadcom/simulator/v3d_simulator_wrapper.cpp b/src/broadcom/simulator/v3d_simulator_wrapper.cpp
index ffd8e463ade..7a6fb98366e 100644
--- a/src/broadcom/simulator/v3d_simulator_wrapper.cpp
+++ b/src/broadcom/simulator/v3d_simulator_wrapper.cpp
@@ -46,7 +46,7 @@ struct v3d_hw *v3d_hw_auto_new(void *in_params)
 }
 
 
-uint32_t v3d_hw_get_mem(const struct v3d_hw *hw, size_t *size, void **p)
+uint32_t v3d_hw_get_mem(const struct v3d_hw *hw, uint32_t *size, void **p)
 {
         return hw->get_mem(size, p);
 }
diff --git a/src/broadcom/simulator/v3d_simulator_wrapper.h b/src/broadcom/simulator/v3d_simulator_wrapper.h
index c6383104f3f..90e7c420701 100644
--- a/src/broadcom/simulator/v3d_simulator_wrapper.h
+++ b/src/broadcom/simulator/v3d_simulator_wrapper.h
@@ -31,7 +31,7 @@ extern "C" {
 #endif
 
 struct v3d_hw *v3d_hw_auto_new(void *params);
-uint32_t v3d_hw_get_mem(const struct v3d_hw *hw, size_t *size, void **p);
+uint32_t v3d_hw_get_mem(const struct v3d_hw *hw, uint32_t *size, void **p);
 bool v3d_hw_alloc_mem(struct v3d_hw *hw, size_t min_size);
 bool v3d_hw_has_gca(struct v3d_hw *hw);
 uint32_t v3d_hw_read_reg(struct v3d_hw *hw, uint32_t reg);