diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 3b25b530f..9f1537345 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -511,7 +511,7 @@ void RasterizerOpenGL::SyncDrawState() {
         glUniform3iv(uniform_tev_cfg.color_modifiers, 1, color_mods);
         glUniform3iv(uniform_tev_cfg.alpha_modifiers, 1, alpha_mods);
         glUniform2i(uniform_tev_cfg.color_alpha_op, (GLint)stage.color_op.Value(), (GLint)stage.alpha_op.Value());
-        glUniform2f(uniform_tev_cfg.color_alpha_multiplier, (GLfloat)stage.GetColorMultiplier(), (GLfloat)stage.GetAlphaMultiplier());
+        glUniform2i(uniform_tev_cfg.color_alpha_multiplier, stage.GetColorMultiplier(), stage.GetAlphaMultiplier());
         glUniform4fv(uniform_tev_cfg.const_color, 1, const_color);
         glUniform2i(uniform_tev_cfg.updates_combiner_buffer_color_alpha,
                     Pica::registers.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferColor(tev_stage_idx),
diff --git a/src/video_core/renderer_opengl/gl_shaders.h b/src/video_core/renderer_opengl/gl_shaders.h
index 6ccf3fe03..517396021 100644
--- a/src/video_core/renderer_opengl/gl_shaders.h
+++ b/src/video_core/renderer_opengl/gl_shaders.h
@@ -147,7 +147,7 @@ struct TEVConfig
     ivec3 color_modifiers;
     ivec3 alpha_modifiers;
     ivec2 color_alpha_op;
-    vec2 color_alpha_multiplier;
+    ivec2 color_alpha_multiplier;
     vec4 const_color;
     bvec2 updates_combiner_buffer_color_alpha;
 };
@@ -248,7 +248,7 @@ vec3 ColorCombine(int op, vec3 color[3]) {
     } else if (op == OPERATION_ADD) {
         return min(color[0] + color[1], 1.0);
     } else if (op == OPERATION_ADDSIGNED) {
-        return color[0] + color[1] - vec3(0.5, 0.5, 0.5);
+        return clamp(color[0] + color[1] - vec3(0.5, 0.5, 0.5), 0.0, 1.0);
     } else if (op == OPERATION_LERP) {
         return color[0] * color[2] + color[1] * (vec3(1.0, 1.0, 1.0) - color[2]);
     } else if (op == OPERATION_SUBTRACT) {
@@ -270,7 +270,7 @@ float AlphaCombine(int op, float alpha[3]) {
     } else if (op == OPERATION_ADD) {
         return min(alpha[0] + alpha[1], 1.0);
     } else if (op == OPERATION_ADDSIGNED) {
-        return alpha[0] + alpha[1] - 0.5;
+        return clamp(alpha[0] + alpha[1] - 0.5, 0.0, 1.0);
     } else if (op == OPERATION_LERP) {
         return alpha[0] * alpha[2] + alpha[1] * (1.0 - alpha[2]);
     } else if (op == OPERATION_SUBTRACT) {