diff --git a/games/idacio/di-dev.c b/games/idacio/di-dev.c
index c3b7bcc..a7758df 100644
--- a/games/idacio/di-dev.c
+++ b/games/idacio/di-dev.c
@@ -32,8 +32,8 @@ static uint8_t idac_di_rumble_duration;
 static uint8_t idac_di_base_damper;
 static uint8_t idac_di_deadband;
 
-/* Fixed spring boost multiplier (1.5x) */
-static const float idac_di_spring_boost = 1.5f;
+/* Fixed spring boost multiplier */
+static const float idac_di_spring_boost = 1.0f;
 
 HRESULT idac_di_dev_init(const struct idac_di_config* cfg,
                          IDirectInputDevice8W* dev, HWND wnd) {
diff --git a/games/idzio/di-dev.c b/games/idzio/di-dev.c
index c0a5cff..84fc364 100644
--- a/games/idzio/di-dev.c
+++ b/games/idzio/di-dev.c
@@ -31,8 +31,8 @@ static uint8_t idz_di_rumble_duration;
 static uint8_t idz_di_base_damper;
 static uint8_t idz_di_deadband;
 
-/* Fixed spring boost multiplier (1.5x) */
-static const float idz_di_spring_boost = 1.5f;
+/* Fixed spring boost multiplier */
+static const float idz_di_spring_boost = 1.0f;
 
 HRESULT idz_di_dev_init(const struct idz_di_config* cfg,
                         IDirectInputDevice8W* dev, HWND wnd) {
diff --git a/games/swdcio/di-dev.c b/games/swdcio/di-dev.c
index 9c5a6c8..2343347 100644
--- a/games/swdcio/di-dev.c
+++ b/games/swdcio/di-dev.c
@@ -32,8 +32,8 @@ static uint8_t swdc_di_rumble_duration;
 static uint8_t swdc_di_base_damper;
 static uint8_t swdc_di_deadband;
 
-/* Fixed spring boost multiplier (1.5x) */
-static const float swdc_di_spring_boost = 1.5f;
+/* Fixed spring boost multiplier */
+static const float swdc_di_spring_boost = 1.0f;
 
 HRESULT swdc_di_dev_init(const struct swdc_di_config* cfg,
                          IDirectInputDevice8W* dev, HWND wnd) {