diff --git a/clang/lib/Driver/ToolChains/RISCVToolchain.cpp b/clang/lib/Driver/ToolChains/RISCVToolchain.cpp
index 714325a2db39e6..a63ada0cbb7e4c 100644
--- a/clang/lib/Driver/ToolChains/RISCVToolchain.cpp
+++ b/clang/lib/Driver/ToolChains/RISCVToolchain.cpp
@@ -98,6 +98,12 @@ void RISCVToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
   if (DriverArgs.hasArg(options::OPT_nostdinc))
     return;
 
+  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
+    SmallString<128> Dir(getDriver().ResourceDir);
+    llvm::sys::path::append(Dir, "include");
+    addSystemInclude(DriverArgs, CC1Args, Dir.str());
+  }
+
   if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
     SmallString<128> Dir(computeSysRoot());
     llvm::sys::path::append(Dir, "include");
diff --git a/clang/test/Driver/Inputs/resource_dir/include/.keep b/clang/test/Driver/Inputs/resource_dir/include/.keep
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/clang/test/Driver/riscv32-toolchain.c b/clang/test/Driver/riscv32-toolchain.c
index fb262a19a04390..50859aaccd7da9 100644
--- a/clang/test/Driver/riscv32-toolchain.c
+++ b/clang/test/Driver/riscv32-toolchain.c
@@ -197,6 +197,20 @@
 // C-RV32-RTLIB-COMPILERRT-ILP32: "--start-group" "-lc" "-lgloss" "--end-group" "{{.*}}libclang_rt.builtins-riscv32.a"
 // C-RV32-RTLIB-COMPILERRT-ILP32: "{{.*}}clang_rt.crtend-riscv32.o"
 
+// RUN: %clang %s -### -no-canonical-prefixes -target riscv32 \
+// RUN:   --gcc-toolchain=%S/Inputs/basic_riscv32_tree \
+// RUN:   -resource-dir=%s/Inputs/resource_dir 2>&1 \
+// RUN:   | FileCheck -check-prefix=RESOURCE-INC %s
+// RESOURCE-INC: "-internal-isystem" "{{.*}}/Inputs/resource_dir{{/|\\\\}}include"
+// RESOURCE-INC: "-internal-isystem" "{{.*}}/basic_riscv32_tree{{.*}}riscv32-unknown-elf{{/|\\\\}}include"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target riscv32 \
+// RUN:   --gcc-toolchain=%S/Inputs/basic_riscv32_tree \
+// RUN:   -resource-dir=%s/Inputs/resource_dir -nobuiltininc 2>&1 \
+// RUN:   | FileCheck -check-prefix=NO-RESOURCE-INC %s
+// NO-RESOURCE-INC-NOT: "-internal-isystem" "{{.*}}/Inputs/resource_dir{{/|\\\\}}include"
+// NO-RESOURCE-INC: "-internal-isystem" "{{.*}}/basic_riscv32_tree/{{.*}}riscv32-unknown-elf{{/|\\\\}}include"
+
 // RUN: %clang -target riscv32 %s -emit-llvm -S -o - | FileCheck %s
 
 typedef __builtin_va_list va_list;
diff --git a/clang/test/Driver/riscv64-toolchain.c b/clang/test/Driver/riscv64-toolchain.c
index 2774e004854c31..59580370c0b34d 100644
--- a/clang/test/Driver/riscv64-toolchain.c
+++ b/clang/test/Driver/riscv64-toolchain.c
@@ -153,6 +153,20 @@
 // C-RV64-RTLIB-COMPILERRT-LP64: "--start-group" "-lc" "-lgloss" "--end-group" "{{.*}}libclang_rt.builtins-riscv64.a"
 // C-RV64-RTLIB-COMPILERRT-LP64: "{{.*}}clang_rt.crtend-riscv64.o"
 
+// RUN: %clang %s -### -no-canonical-prefixes -target riscv64 \
+// RUN:   --gcc-toolchain=%S/Inputs/basic_riscv64_tree \
+// RUN:   -resource-dir=%s/Inputs/resource_dir 2>&1 \
+// RUN:   | FileCheck -check-prefix=RESOURCE-INC %s
+// RESOURCE-INC: "-internal-isystem" "{{.*}}/Inputs/resource_dir{{/|\\\\}}include"
+// RESOURCE-INC: "-internal-isystem" "{{.*}}/basic_riscv64_tree/{{.*}}riscv64-unknown-elf{{/|\\\\}}include"
+
+// RUN: %clang %s -### -no-canonical-prefixes -target riscv64 \
+// RUN:   --gcc-toolchain=%S/Inputs/basic_riscv64_tree \
+// RUN:   -resource-dir=%s/Inputs/resource_dir -nobuiltininc 2>&1 \
+// RUN:   | FileCheck -check-prefix=NO-RESOURCE-INC %s
+// NO-RESOURCE-INC-NOT: "-internal-isystem" "{{.*}}Inputs/resource_dir{{/|\\\\}}include"
+// NO-RESOURCE-INC: "-internal-isystem" "{{.*}}/basic_riscv64_tree/{{.*}}riscv64-unknown-elf{{/|\\\\}}include"
+
 // RUN: %clang -target riscv64 %s -emit-llvm -S -o - | FileCheck %s
 
 typedef __builtin_va_list va_list;