diff --git a/base/runtime/internal.odin b/base/runtime/internal.odin
index e08d0e01d..a682f7e76 100644
--- a/base/runtime/internal.odin
+++ b/base/runtime/internal.odin
@@ -1032,9 +1032,9 @@ quo_quaternion64 :: proc "contextless" (q, r: quaternion64) -> quaternion64 {
 	invmag2 := 1.0 / (r0*r0 + r1*r1 + r2*r2 + r3*r3)
 
 	t0 := (r0*q0 + r1*q1 + r2*q2 + r3*q3) * invmag2
-	t1 := (r0*q1 - r1*q0 - r2*q3 - r3*q2) * invmag2
+	t1 := (r0*q1 - r1*q0 + r2*q3 - r3*q2) * invmag2
 	t2 := (r0*q2 - r1*q3 - r2*q0 + r3*q1) * invmag2
-	t3 := (r0*q3 + r1*q2 + r2*q1 - r3*q0) * invmag2
+	t3 := (r0*q3 + r1*q2 - r2*q1 - r3*q0) * invmag2
 
 	return quaternion(w=f16(t0), x=f16(t1), y=f16(t2), z=f16(t3))
 }
@@ -1046,9 +1046,9 @@ quo_quaternion128 :: proc "contextless" (q, r: quaternion128) -> quaternion128 {
 	invmag2 := 1.0 / (r0*r0 + r1*r1 + r2*r2 + r3*r3)
 
 	t0 := (r0*q0 + r1*q1 + r2*q2 + r3*q3) * invmag2
-	t1 := (r0*q1 - r1*q0 - r2*q3 - r3*q2) * invmag2
+	t1 := (r0*q1 - r1*q0 + r2*q3 - r3*q2) * invmag2
 	t2 := (r0*q2 - r1*q3 - r2*q0 + r3*q1) * invmag2
-	t3 := (r0*q3 + r1*q2 + r2*q1 - r3*q0) * invmag2
+	t3 := (r0*q3 + r1*q2 - r2*q1 - r3*q0) * invmag2
 
 	return quaternion(w=t0, x=t1, y=t2, z=t3)
 }
@@ -1060,9 +1060,9 @@ quo_quaternion256 :: proc "contextless" (q, r: quaternion256) -> quaternion256 {
 	invmag2 := 1.0 / (r0*r0 + r1*r1 + r2*r2 + r3*r3)
 
 	t0 := (r0*q0 + r1*q1 + r2*q2 + r3*q3) * invmag2
-	t1 := (r0*q1 - r1*q0 - r2*q3 - r3*q2) * invmag2
+	t1 := (r0*q1 - r1*q0 + r2*q3 - r3*q2) * invmag2
 	t2 := (r0*q2 - r1*q3 - r2*q0 + r3*q1) * invmag2
-	t3 := (r0*q3 + r1*q2 + r2*q1 - r3*q0) * invmag2
+	t3 := (r0*q3 + r1*q2 - r2*q1 - r3*q0) * invmag2
 
 	return quaternion(w=t0, x=t1, y=t2, z=t3)
 }