diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index af2aa7214a..198a4ef94f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,13 +65,13 @@ jobs:
       - name: Build | Compile (Native)
         env:
           ESP_IDF_VERSION: ${{ matrix.idf-version }}
-          RUSTFLAGS: "${{ startsWith(matrix.idf-version, 'v5') && '--cfg espidf_time64' || '' }}"
+          RUSTFLAGS: "${{ startsWith(matrix.idf-version, 'v5') && '--cfg espidf_time64' || startsWith(matrix.idf-version, 'v4') && '--cfg espidf_time32' }}"
         run: cargo build --target ${{ matrix.target }} -Zbuild-std=std,panic_abort -Zbuild-std-features=panic_immediate_abort
 
       - name: Build | Compile (Native), no_std
         env:
           ESP_IDF_VERSION: ${{ matrix.idf-version }}
-          RUSTFLAGS: "${{ startsWith(matrix.idf-version, 'v5') && '--cfg espidf_time64' || '' }}"
+          RUSTFLAGS: "${{ startsWith(matrix.idf-version, 'v5') && '--cfg espidf_time64' || startsWith(matrix.idf-version, 'v4') && '--cfg espidf_time32' }}"
         run: cargo build --target ${{ matrix.target }} --no-default-features -Zbuild-std=std,panic_abort -Zbuild-std-features=panic_immediate_abort
 
 #      - name: Build | Compile (Native), alloc
@@ -90,5 +90,5 @@ jobs:
       - name: Build | Examples
         env:
           ESP_IDF_VERSION: ${{ matrix.idf-version }}
-          RUSTFLAGS: "${{ startsWith(matrix.idf-version, 'v5') && '--cfg espidf_time64' || '' }}"
+          RUSTFLAGS: "${{ startsWith(matrix.idf-version, 'v5') && '--cfg espidf_time64' || startsWith(matrix.idf-version, 'v4') && '--cfg espidf_time32' }}"
         run: cargo build --examples --target ${{ matrix.target }} -Zbuild-std=std,panic_abort -Zbuild-std-features=panic_immediate_abort