diff --git a/include/cglm/vec3-ext.h b/include/cglm/vec3-ext.h
index 7890c33..8a9226f 100644
--- a/include/cglm/vec3-ext.h
+++ b/include/cglm/vec3-ext.h
@@ -169,7 +169,7 @@ glm_vec_min(vec3 v) {
 CGLM_INLINE
 bool
 glm_vec_isnan(vec3 v) {
-  return !(isnan(v[0]) || isnan(v[1]) || isnan(v[2]));
+  return isnan(v[0]) || isnan(v[1]) || isnan(v[2]);
 }
 
 /*!
@@ -181,7 +181,7 @@ glm_vec_isnan(vec3 v) {
 CGLM_INLINE
 bool
 glm_vec_isinf(vec3 v) {
-  return !(isinf(v[0]) || isinf(v[1]) || isinf(v[2]));
+  return isinf(v[0]) || isinf(v[1]) || isinf(v[2]);
 }
 
 /*!
diff --git a/include/cglm/vec4-ext.h b/include/cglm/vec4-ext.h
index c290477..2859588 100644
--- a/include/cglm/vec4-ext.h
+++ b/include/cglm/vec4-ext.h
@@ -183,7 +183,7 @@ glm_vec4_min(vec4 v) {
 CGLM_INLINE
 bool
 glm_vec4_isnan(vec4 v) {
-  return !(isnan(v[0]) || isnan(v[1]) || isnan(v[2]) || isnan(v[3]));
+  return isnan(v[0]) || isnan(v[1]) || isnan(v[2]) || isnan(v[3]);
 }
 
 /*!
@@ -195,7 +195,7 @@ glm_vec4_isnan(vec4 v) {
 CGLM_INLINE
 bool
 glm_vec4_isinf(vec4 v) {
-  return !(isinf(v[0]) || isinf(v[1]) || isinf(v[2]) || isinf(v[3]));
+  return isinf(v[0]) || isinf(v[1]) || isinf(v[2]) || isinf(v[3]);
 }
 
 /*!