diff --git a/gfx_es2/gl_state.cpp b/gfx_es2/gl_state.cpp
index a1ed3c24fe..ab97de2dd5 100644
--- a/gfx_es2/gl_state.cpp
+++ b/gfx_es2/gl_state.cpp
@@ -324,7 +324,7 @@ void CheckGLExtensions() {
 		};
 		for (int st = 0; st < 2; st++) {
 			for (int p = 0; p < 6; p++) {
-				glGetShaderPrecisionFormat(shaderTypes[st], precisions[p], gl_extensions.range[st][p], &gl_extensions.precision[p]);
+				glGetShaderPrecisionFormat(shaderTypes[st], precisions[p], gl_extensions.range[st][p], &gl_extensions.precision[st][p]);
 			}
 		}
 	}
diff --git a/gfx_es2/gpu_features.h b/gfx_es2/gpu_features.h
index 12f27a4d19..37faea8fde 100644
--- a/gfx_es2/gpu_features.h
+++ b/gfx_es2/gpu_features.h
@@ -76,7 +76,7 @@ struct GLExtensions {
 
 	// Shader precision. Only fetched on ES for now.
 	int range[2][6][2];  // [vs,fs][lowf,mediumf,highf,lowi,mediumi,highi][min,max]
-	int precision[6];
+	int precision[2][6];  // [vs,fs][lowf...]
 
 	// greater-or-equal than
 	bool VersionGEThan(int major, int minor, int sub = 0);