diff --git a/src/input.c b/src/input.c
index c619eefc..b68ddef4 100644
--- a/src/input.c
+++ b/src/input.c
@@ -333,10 +333,8 @@ void _glfwInputChar(_GLFWwindow* window, uint32_t codepoint, int mods, GLFWbool
 void _glfwInputScroll(_GLFWwindow* window, double xoffset, double yoffset)
 {
     assert(window != NULL);
-    assert(xoffset > -FLT_MAX);
-    assert(xoffset < FLT_MAX);
-    assert(yoffset > -FLT_MAX);
-    assert(yoffset < FLT_MAX);
+    assert(isfinite(xoffset));
+    assert(isfinite(yoffset));
 
     if (window->callbacks.scroll)
         window->callbacks.scroll((GLFWwindow*) window, xoffset, yoffset);
@@ -375,10 +373,8 @@ void _glfwInputMouseClick(_GLFWwindow* window, int button, int action, int mods)
 void _glfwInputCursorPos(_GLFWwindow* window, double xpos, double ypos)
 {
     assert(window != NULL);
-    assert(xpos > -FLT_MAX);
-    assert(xpos < FLT_MAX);
-    assert(ypos > -FLT_MAX);
-    assert(ypos < FLT_MAX);
+    assert(isfinite(xpos));
+    assert(isfinite(ypos));
 
     if (window->virtualCursorPosX == xpos && window->virtualCursorPosY == ypos)
         return;
@@ -436,6 +432,7 @@ void _glfwInputJoystickAxis(_GLFWjoystick* js, int axis, float value)
     assert(js != NULL);
     assert(axis >= 0);
     assert(axis < js->axisCount);
+    assert(isfinite(value));
 
     js->axes[axis] = value;
 }
@@ -818,8 +815,7 @@ GLFWAPI void glfwSetCursorPos(GLFWwindow* handle, double xpos, double ypos)
     _GLFWwindow* window = (_GLFWwindow*) handle;
     assert(window != NULL);
 
-    if (xpos != xpos || xpos < -DBL_MAX || xpos > DBL_MAX ||
-        ypos != ypos || ypos < -DBL_MAX || ypos > DBL_MAX)
+    if (!isfinite(xpos) || !isfinite(ypos))
     {
         _glfwInputError(GLFW_INVALID_VALUE,
                         "Invalid cursor position %f %f",
@@ -1499,7 +1495,7 @@ GLFWAPI void glfwSetTime(double time)
 {
     _GLFW_REQUIRE_INIT();
 
-    if (time != time || time < 0.0 || time > 18446744073.0)
+    if (!isfinite(time) || time < 0.0 || time > 18446744073.0)
     {
         _glfwInputError(GLFW_INVALID_VALUE, "Invalid time %f", time);
         return;
diff --git a/src/monitor.c b/src/monitor.c
index cc95efb6..7cdf2df1 100644
--- a/src/monitor.c
+++ b/src/monitor.c
@@ -467,14 +467,15 @@ GLFWAPI void glfwSetGamma(GLFWmonitor* handle, float gamma)
     unsigned short* values;
     GLFWgammaramp ramp;
     const GLFWgammaramp* original;
+
     assert(gamma > 0.f);
-    assert(gamma <= FLT_MAX);
+    assert(isfinite(gamma));
 
     _GLFW_REQUIRE_INIT();
 
     assert(handle != NULL);
 
-    if (gamma != gamma || gamma <= 0.f || gamma > FLT_MAX)
+    if (!isfinite(gamma) || gamma <= 0.f)
     {
         _glfwInputError(GLFW_INVALID_VALUE, "Invalid gamma value %f", gamma);
         return;
diff --git a/src/window.c b/src/window.c
index 3a3b66df..36d30baf 100644
--- a/src/window.c
+++ b/src/window.c
@@ -32,7 +32,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <float.h>
-
+#include <math.h>
 
 //////////////////////////////////////////////////////////////////////////
 //////                         GLFW event API                       //////
@@ -135,9 +135,9 @@ void _glfwInputWindowContentScale(_GLFWwindow* window, float xscale, float yscal
 {
     assert(window != NULL);
     assert(xscale > 0.f);
-    assert(xscale < FLT_MAX);
+    assert(isfinite(xscale));
     assert(yscale > 0.f);
-    assert(yscale < FLT_MAX);
+    assert(isfinite(yscale));
 
     if (window->callbacks.scale)
         window->callbacks.scale((GLFWwindow*) window, xscale, yscale);
@@ -776,7 +776,7 @@ GLFWAPI float glfwGetWindowOpacity(GLFWwindow* handle)
 
 GLFWAPI void glfwSetWindowOpacity(GLFWwindow* handle, float opacity)
 {
-    assert(opacity == opacity);
+    assert(isfinite(opacity));
     assert(opacity >= 0.f);
     assert(opacity <= 1.f);
 
@@ -785,7 +785,7 @@ GLFWAPI void glfwSetWindowOpacity(GLFWwindow* handle, float opacity)
     _GLFWwindow* window = (_GLFWwindow*) handle;
     assert(window != NULL);
 
-    if (opacity != opacity || opacity < 0.f || opacity > 1.f)
+    if (!isfinite(opacity) || opacity < 0.f || opacity > 1.f)
     {
         _glfwInputError(GLFW_INVALID_VALUE, "Invalid window opacity %f", opacity);
         return;
@@ -1178,11 +1178,10 @@ GLFWAPI void glfwWaitEvents(void)
 GLFWAPI void glfwWaitEventsTimeout(double timeout)
 {
     _GLFW_REQUIRE_INIT();
-    assert(timeout == timeout);
+    assert(isfinite(timeout));
     assert(timeout >= 0.0);
-    assert(timeout <= DBL_MAX);
 
-    if (timeout != timeout || timeout < 0.0 || timeout > DBL_MAX)
+    if (!isfinite(timeout) || timeout < 0.0)
     {
         _glfwInputError(GLFW_INVALID_VALUE, "Invalid time %f", timeout);
         return;