diff --git a/src/client/refresh/gl1/gl1_light.c b/src/client/refresh/gl1/gl1_light.c
index 8988546d..ef580fd8 100644
--- a/src/client/refresh/gl1/gl1_light.c
+++ b/src/client/refresh/gl1/gl1_light.c
@@ -96,7 +96,7 @@ R_RenderDlights(void)
 	/* because the count hasn't advanced yet for this frame */
 	r_dlightframecount = r_framecount + 1;
 
-	glDepthMask(0);
+	glDepthMask(GL_FALSE);
 	glDisable(GL_TEXTURE_2D);
 	glShadeModel(GL_SMOOTH);
 	glEnable(GL_BLEND);
@@ -113,7 +113,7 @@ R_RenderDlights(void)
 	glDisable(GL_BLEND);
 	glEnable(GL_TEXTURE_2D);
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-	glDepthMask(1);
+	glDepthMask(GL_TRUE);
 }
 
 void
diff --git a/src/client/refresh/gl1/gl1_main.c b/src/client/refresh/gl1/gl1_main.c
index fdbdfe75..cc61bdd7 100644
--- a/src/client/refresh/gl1/gl1_main.c
+++ b/src/client/refresh/gl1/gl1_main.c
@@ -369,7 +369,7 @@ R_DrawEntitiesOnList(void)
 	/* draw transparent entities
 	   we could sort these if it ever
 	   becomes a problem... */
-	glDepthMask(0);
+	glDepthMask(GL_FALSE);
 
 	for (i = 0; i < r_newrefdef.num_entities; i++)
 	{
@@ -413,7 +413,7 @@ R_DrawEntitiesOnList(void)
 		}
 	}
 
-	glDepthMask(1); /* back to writing */
+	glDepthMask(GL_TRUE); /* back to writing */
 }
 
 void
@@ -510,7 +510,7 @@ R_DrawParticles2(int num_particles, const particle_t particles[],
 
 	glDisable(GL_BLEND);
 	glColor4f(1, 1, 1, 1);
-	glDepthMask(1); /* back to normal Z buffering */
+	glDepthMask(GL_TRUE); /* back to normal Z buffering */
 	R_TexEnv(GL_REPLACE);
 
 	YQ2_VLAFREE(vtx);
@@ -814,7 +814,7 @@ R_Clear(void)
 	// Check whether the stencil buffer needs clearing, and do so if need be.
 	GLbitfield stencilFlags = 0;
 	if (gl_state.stereo_mode >= STEREO_MODE_ROW_INTERLEAVED && gl_state.stereo_mode <= STEREO_MODE_PIXEL_INTERLEAVED) {
-		glClearStencil(0);
+		glClearStencil(GL_FALSE);
 		stencilFlags |= GL_STENCIL_BUFFER_BIT;
 	}
 
@@ -875,7 +875,7 @@ R_Clear(void)
 	/* stencilbuffer shadows */
 	if (gl_shadows->value && gl_state.stencil && gl1_stencilshadow->value)
 	{
-		glClearStencil(1);
+		glClearStencil(GL_TRUE);
 		glClear(GL_STENCIL_BUFFER_BIT);
 	}
 }
diff --git a/src/client/refresh/gl1/gl1_surf.c b/src/client/refresh/gl1/gl1_surf.c
index 1b29bfee..e824ce31 100644
--- a/src/client/refresh/gl1/gl1_surf.c
+++ b/src/client/refresh/gl1/gl1_surf.c
@@ -232,7 +232,7 @@ R_BlendLightmaps(const model_t *currentmodel)
 	}
 
 	/* don't bother writing Z */
-	glDepthMask(0);
+	glDepthMask(GL_FALSE);
 
 	/* set the appropriate blending mode unless
 	   we're only looking at the lightmaps. */
@@ -397,7 +397,7 @@ R_BlendLightmaps(const model_t *currentmodel)
 	/* restore state */
 	glDisable(GL_BLEND);
 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-	glDepthMask(1);
+	glDepthMask(GL_TRUE);
 }
 
 static void
diff --git a/src/client/refresh/gl3/gl3_main.c b/src/client/refresh/gl3/gl3_main.c
index e1bac34b..164c3079 100644
--- a/src/client/refresh/gl3/gl3_main.c
+++ b/src/client/refresh/gl3/gl3_main.c
@@ -1124,7 +1124,7 @@ GL3_DrawEntitiesOnList(void)
 	/* draw transparent entities
 	   we could sort these if it ever
 	   becomes a problem... */
-	glDepthMask(0);
+	glDepthMask(GL_FALSE);
 
 	for (i = 0; i < gl3_newrefdef.num_entities; i++)
 	{
@@ -1170,7 +1170,7 @@ GL3_DrawEntitiesOnList(void)
 
 	GL3_DrawAliasShadows();
 
-	glDepthMask(1); /* back to writing */
+	glDepthMask(GL_TRUE); /* back to writing */
 }
 
 static void
@@ -1790,7 +1790,7 @@ GL3_Clear(void)
 	GLbitfield stencilFlags = 0;
 #if 0 // TODO: stereo stuff
 	if (gl3state.stereo_mode >= STEREO_MODE_ROW_INTERLEAVED && gl_state.stereo_mode <= STEREO_MODE_PIXEL_INTERLEAVED) {
-		glClearStencil(0);
+		glClearStencil(GL_FALSE);
 		stencilFlags |= GL_STENCIL_BUFFER_BIT;
 	}
 #endif // 0
@@ -1826,7 +1826,7 @@ GL3_Clear(void)
 	/* stencilbuffer shadows */
 	if (gl_shadows->value && gl3config.stencil)
 	{
-		glClearStencil(1);
+		glClearStencil(GL_TRUE);
 		glClear(GL_STENCIL_BUFFER_BIT);
 	}
 }
diff --git a/src/client/refresh/gl4/gl4_main.c b/src/client/refresh/gl4/gl4_main.c
index 763f24dd..de563903 100644
--- a/src/client/refresh/gl4/gl4_main.c
+++ b/src/client/refresh/gl4/gl4_main.c
@@ -1095,7 +1095,7 @@ GL4_DrawEntitiesOnList(void)
 	/* draw transparent entities
 	   we could sort these if it ever
 	   becomes a problem... */
-	glDepthMask(0);
+	glDepthMask(GL_FALSE);
 
 	for (i = 0; i < gl4_newrefdef.num_entities; i++)
 	{
@@ -1141,8 +1141,7 @@ GL4_DrawEntitiesOnList(void)
 
 	GL4_DrawAliasShadows();
 
-	glDepthMask(1); /* back to writing */
-
+	glDepthMask(GL_TRUE); /* back to writing */
 }
 
 static void
@@ -1757,7 +1756,7 @@ GL4_Clear(void)
 	GLbitfield stencilFlags = 0;
 #if 0 // TODO: stereo stuff
 	if (gl4state.stereo_mode >= STEREO_MODE_ROW_INTERLEAVED && gl_state.stereo_mode <= STEREO_MODE_PIXEL_INTERLEAVED) {
-		glClearStencil(0);
+		glClearStencil(GL_FALSE);
 		stencilFlags |= GL_STENCIL_BUFFER_BIT;
 	}
 #endif // 0
@@ -1793,7 +1792,7 @@ GL4_Clear(void)
 	/* stencilbuffer shadows */
 	if (gl_shadows->value && gl4config.stencil)
 	{
-		glClearStencil(1);
+		glClearStencil(GL_TRUE);
 		glClear(GL_STENCIL_BUFFER_BIT);
 	}
 }