diff --git a/libs/video/renderer/vulkan/projection.c b/libs/video/renderer/vulkan/projection.c
index a4f597268..1dda6a7b6 100644
--- a/libs/video/renderer/vulkan/projection.c
+++ b/libs/video/renderer/vulkan/projection.c
@@ -77,8 +77,8 @@ QFV_PerspectiveTan (mat4f_t proj, float fov, float aspect)
 	fard = r_farclip->value;
 
 	proj[0] = (vec4f_t) { f / aspect, 0, 0, 0 };
-	proj[1] = (vec4f_t) { 0, -f, 0, 0 };
-	proj[2] = (vec4f_t) { 0, 0, fard / (neard - fard), -1 };
+	proj[1] = (vec4f_t) { 0, f, 0, 0 };
+	proj[2] = (vec4f_t) { 0, 0, fard / (fard - neard), 1 };
 	proj[3] = (vec4f_t) { 0, 0, (neard * fard) / (neard - fard), 0 };
 }
 
diff --git a/libs/video/renderer/vulkan/vulkan_matrices.c b/libs/video/renderer/vulkan/vulkan_matrices.c
index b35759ab9..fe66c04d4 100644
--- a/libs/video/renderer/vulkan/vulkan_matrices.c
+++ b/libs/video/renderer/vulkan/vulkan_matrices.c
@@ -64,11 +64,13 @@ static void
 setup_view (vulkan_ctx_t *ctx)
 {
 	mat4f_t     view;
+	// Quake's world is z-up, x-forward, y-left, but Vulkan's world is
+	// z-forward, x-right, y-down.
 	static mat4f_t z_up = {
-		{ 0, 0, -1, 0},
-		{-1, 0,  0, 0},
-		{ 0, 1,  0, 0},
-		{ 0, 0,  0, 1},
+		{ 0, 0, 1, 0},
+		{-1, 0, 0, 0},
+		{ 0,-1, 0, 0},
+		{ 0, 0, 0, 1},
 	};
 	vec4f_t     offset = { 0, 0, 0, 1 };