diff --git a/include/cglm/vec2-ext.h b/include/cglm/vec2-ext.h
index e9711c2..2cb5df3 100644
--- a/include/cglm/vec2-ext.h
+++ b/include/cglm/vec2-ext.h
@@ -197,6 +197,7 @@ glm_vec2_sqrt(vec2 v, vec2 dest) {
  * @param[out] dest destination number
  */
 CGLM_INLINE
+void
 glm_vec2_complex_mul(vec2 a, vec2 b, vec2 dest) {
   float tr, ti;
   tr = a[0] * b[0] - a[1] * b[1];
@@ -213,6 +214,7 @@ glm_vec2_complex_mul(vec2 a, vec2 b, vec2 dest) {
  * @param[out] dest destination number
  */
 CGLM_INLINE
+void
 glm_vec2_complex_div(vec2 a, vec2 b, vec2 dest) {
   float tr, ti;
   float const ibnorm2 = 1.0f / (b[0] * b[0] + b[1] * b[1]);
@@ -229,6 +231,7 @@ glm_vec2_complex_div(vec2 a, vec2 b, vec2 dest) {
  * @param[out] dest destination number
  */
 CGLM_INLINE
+void
 glm_vec2_complex_conjugate(vec2 a, vec2 dest) {
   dest[0] =  a[0]
   dest[1] = -a[1];