diff --git a/basic-geometry/dual-quaternion.h b/basic-geometry/dual-quaternion.h
index 36f008a..273657b 100644
--- a/basic-geometry/dual-quaternion.h
+++ b/basic-geometry/dual-quaternion.h
@@ -92,7 +92,7 @@ inline void bgc_fp64_dual_quaternion_get_reverse(BGC_FP64_DualQuaternion* revers
 
 inline int bgc_fp32_dual_quaternion_invert(BGC_FP32_DualQuaternion* quaternion)
 {
-    if (bgc_fp32_quaternion_get_inverse(&quaternion->real_part, &quaternion->real_part) !== BGC_SUCCESS) {
+    if (bgc_fp32_quaternion_get_inverse(&quaternion->real_part, &quaternion->real_part) != BGC_SUCCESS) {
         return BGC_FAILURE;
     }
 
@@ -108,7 +108,7 @@ inline int bgc_fp32_dual_quaternion_invert(BGC_FP32_DualQuaternion* quaternion)
 
 inline int bgc_fp64_dual_quaternion_invert(BGC_FP64_DualQuaternion* quaternion)
 {
-    if (bgc_fp64_quaternion_get_inverse(&quaternion->real_part, &quaternion->real_part) !== BGC_SUCCESS) {
+    if (bgc_fp64_quaternion_get_inverse(&quaternion->real_part, &quaternion->real_part) != BGC_SUCCESS) {
         return BGC_FAILURE;
     }
 
@@ -126,7 +126,7 @@ inline int bgc_fp64_dual_quaternion_invert(BGC_FP64_DualQuaternion* quaternion)
 
 inline int bgc_fp32_dual_quaternion_get_inverse(BGC_FP32_DualQuaternion* inverse, const BGC_FP32_DualQuaternion* quaternion)
 {
-    if (bgc_fp32_quaternion_get_inverse(&inverse->real_part, &quaternion->real_part) !== BGC_SUCCESS) {
+    if (bgc_fp32_quaternion_get_inverse(&inverse->real_part, &quaternion->real_part) != BGC_SUCCESS) {
         return BGC_FAILURE;
     }
 
@@ -142,7 +142,7 @@ inline int bgc_fp32_dual_quaternion_get_inverse(BGC_FP32_DualQuaternion* inverse
 
 inline int bgc_fp64_dual_quaternion_get_inverse(BGC_FP64_DualQuaternion* inverse, const BGC_FP64_DualQuaternion* quaternion)
 {
-    if (bgc_fp64_quaternion_get_inverse(&inverse->real_part, &quaternion->real_part) !== BGC_SUCCESS) {
+    if (bgc_fp64_quaternion_get_inverse(&inverse->real_part, &quaternion->real_part) != BGC_SUCCESS) {
         return BGC_FAILURE;
     }