diff --git a/components/driver/mcpwm/mcpwm_cap.c b/components/driver/mcpwm/mcpwm_cap.c
index 8ff7910bd9..a980277c25 100644
--- a/components/driver/mcpwm/mcpwm_cap.c
+++ b/components/driver/mcpwm/mcpwm_cap.c
@@ -96,13 +96,14 @@ esp_err_t mcpwm_new_capture_timer(const mcpwm_capture_timer_config_t *config, mc
     mcpwm_group_t *group = cap_timer->group;
     int group_id = group->group_id;
 
+    mcpwm_capture_clock_source_t clk_src = config->clk_src ? config->clk_src : MCPWM_CAPTURE_CLK_SRC_DEFAULT;
 #if SOC_MCPWM_CAPTURE_CLK_FROM_GROUP
     // capture timer clock source is same as the MCPWM group
-    ESP_GOTO_ON_ERROR(mcpwm_select_periph_clock(group, (soc_module_clk_t)config->clk_src), err, TAG, "set group clock failed");
+    ESP_GOTO_ON_ERROR(mcpwm_select_periph_clock(group, (soc_module_clk_t)clk_src), err, TAG, "set group clock failed");
     cap_timer->resolution_hz = group->resolution_hz;
 #else
     // capture timer has independent clock source selection
-    switch (config->clk_src) {
+    switch (clk_src) {
     case MCPWM_CAPTURE_CLK_SRC_APB:
         cap_timer->resolution_hz = esp_clk_apb_freq();
 #if CONFIG_PM_ENABLE
diff --git a/components/driver/mcpwm/mcpwm_timer.c b/components/driver/mcpwm/mcpwm_timer.c
index 710b0716f5..01a86aed23 100644
--- a/components/driver/mcpwm/mcpwm_timer.c
+++ b/components/driver/mcpwm/mcpwm_timer.c
@@ -101,7 +101,8 @@ esp_err_t mcpwm_new_timer(const mcpwm_timer_config_t *config, mcpwm_timer_handle
     mcpwm_hal_context_t *hal = &group->hal;
     int timer_id = timer->timer_id;
     // select the clock source
-    ESP_GOTO_ON_ERROR(mcpwm_select_periph_clock(group, (soc_module_clk_t)config->clk_src), err, TAG, "set group clock failed");
+    mcpwm_timer_clock_source_t clk_src = config->clk_src ? config->clk_src : MCPWM_TIMER_CLK_SRC_DEFAULT;
+    ESP_GOTO_ON_ERROR(mcpwm_select_periph_clock(group, (soc_module_clk_t)clk_src), err, TAG, "set group clock failed");
     // reset the timer to a determined state
     mcpwm_hal_timer_reset(hal, timer_id);
     // set timer resolution