diff --git a/kernel-dkms/common/inc/nv-linux.h b/kernel-dkms/common/inc/nv-linux.h
index e235842..805e525 100644
--- a/kernel-dkms/common/inc/nv-linux.h
+++ b/kernel-dkms/common/inc/nv-linux.h
@@ -531,7 +531,11 @@ static inline void *nv_ioremap(NvU64 phys, NvU64 size)
 
 static inline void *nv_ioremap_nocache(NvU64 phys, NvU64 size)
 {
+#if defined(NV_IOREMAP_NOCACHE_PRESENT)
     void *ptr = ioremap_nocache(phys, size);
+#else
+    void *ptr = ioremap(phys, size);
+#endif
     if (ptr)
         NV_MEMDBG_ADD(ptr, size);
     return ptr;
diff --git a/kernel-dkms/nvidia/nvidia.Kbuild b/kernel-dkms/nvidia/nvidia.Kbuild
index 5ec3e65..2897e31 100644
--- a/kernel-dkms/nvidia/nvidia.Kbuild
+++ b/kernel-dkms/nvidia/nvidia.Kbuild
@@ -104,6 +104,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += set_memory_array_uc
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += acquire_console_sem
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += console_lock
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += ioremap_cache
+NV_CONFTEST_FUNCTION_COMPILE_TESTS += ioremap_nocache
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += ioremap_wc
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += acpi_walk_namespace
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += sg_alloc_table
diff --git a/kernel-dkms/conftest.sh b/kernel-dkms/conftest.sh
index 57d85a4..4902248 100755
--- a/kernel-dkms/conftest.sh
+++ b/kernel-dkms/conftest.sh
@@ -780,6 +780,22 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_IOREMAP_CACHE_PRESENT" "" "functions"
         ;;
 
+        ioremap_nocache)
+            #
+            # Determine if the ioremap_nocache() function is present.
+            #
+            # Removed by commit 4bdc0d676a64 ("remove ioremap_nocache and
+            # devm_ioremap_nocache") in v5.6 (2020-01-06)
+            #
+            CODE="
+            #include <asm/io.h>
+            void conftest_ioremap_nocache(void) {
+                ioremap_nocache();
+            }"
+
+            compile_check_conftest "$CODE" "NV_IOREMAP_NOCACHE_PRESENT" "" "functions"
+        ;;
+
         ioremap_wc)
             #
             # Determine if the ioremap_wc() function is present.