diff --git a/drivers/gpu/nvgpu/common/sim/sim.c b/drivers/gpu/nvgpu/common/sim/sim.c
index ea4b8879d..ef9320796 100644
--- a/drivers/gpu/nvgpu/common/sim/sim.c
+++ b/drivers/gpu/nvgpu/common/sim/sim.c
@@ -219,7 +219,7 @@ static int issue_rpc_and_wait(struct gk20a *g)
 }
 
 static void nvgpu_sim_esc_readl(struct gk20a *g,
-		char *path, u32 index, u32 *data)
+		const char *path, u32 index, u32 *data)
 {
 	int err;
 	size_t pathlen = strlen(path);
diff --git a/drivers/gpu/nvgpu/common/sim/sim_pci.c b/drivers/gpu/nvgpu/common/sim/sim_pci.c
index f66f292ff..89ec2fa74 100644
--- a/drivers/gpu/nvgpu/common/sim/sim_pci.c
+++ b/drivers/gpu/nvgpu/common/sim/sim_pci.c
@@ -185,7 +185,7 @@ static int issue_rpc_and_wait(struct gk20a *g)
 }
 
 static void nvgpu_sim_esc_readl(struct gk20a *g,
-		char *path, u32 index, u32 *data)
+		const char *path, u32 index, u32 *data)
 {
 	int err;
 	size_t pathlen = strlen(path);
diff --git a/drivers/gpu/nvgpu/include/nvgpu/sim.h b/drivers/gpu/nvgpu/include/nvgpu/sim.h
index e15a74cd1..e79b83658 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/sim.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/sim.h
@@ -37,7 +37,7 @@ struct sim_nvgpu {
 	void (*sim_init_late)(struct gk20a *g);
 	void (*remove_support)(struct gk20a *g);
 	void (*esc_readl)(
-		struct gk20a *g, char *path, u32 index, u32 *data);
+		struct gk20a *g, const char *path, u32 index, u32 *data);
 };
 #ifdef __KERNEL__
 #include "linux/sim.h"