diff --git a/spirv_cross_c.cpp b/spirv_cross_c.cpp
index e48bfbfb..6a6dee0c 100644
--- a/spirv_cross_c.cpp
+++ b/spirv_cross_c.cpp
@@ -823,15 +823,15 @@ spvc_result spvc_compiler_require_extension(spvc_compiler compiler, const char *
 size_t spvc_compiler_get_num_required_extensions(spvc_compiler compiler) 
 {
 #if SPIRV_CROSS_C_API_GLSL
-	if (compiler->backend == SPVC_BACKEND_NONE)
+	if (compiler->backend != SPVC_BACKEND_GLSL)
 	{
-		compiler->context->report_error("Cross-compilation related option used on NONE backend which only supports reflection.");
+		compiler->context->report_error("Enabled extensions can only be queried on GLSL backend.");
 		return SPVC_ERROR_INVALID_ARGUMENT;
 	}
 
 	return static_cast<CompilerGLSL *>(compiler->compiler.get())->get_required_extensions().size();
 #else
-	compiler->context->report_error("Cross-compilation related option used on NONE backend which only supports reflection.");
+	compiler->context->report_error("Enabled extensions can only be queried on GLSL backend.");
 	return 0;
 #endif
 }
@@ -839,20 +839,19 @@ size_t spvc_compiler_get_num_required_extensions(spvc_compiler compiler)
 const char *spvc_compiler_get_required_extension(spvc_compiler compiler, size_t index)
 {
 #if SPIRV_CROSS_C_API_GLSL
-	if (compiler->backend == SPVC_BACKEND_NONE)
+	if (compiler->backend != SPVC_BACKEND_GLSL)
 	{
-		compiler->context->report_error("Cross-compilation related option used on NONE backend which only supports reflection.");
+		compiler->context->report_error("Enabled extensions can only be queried on GLSL backend.");
 		return nullptr;
 	}
 
-	auto& exts = static_cast<CompilerGLSL *>(compiler->compiler.get())->get_required_extensions();
-	if (index < exts.size()) {
+	auto &exts = static_cast<CompilerGLSL *>(compiler->compiler.get())->get_required_extensions();
+	if (index < exts.size())
 		return exts[index].c_str();
-	} else {
+	else
 		return nullptr;
-	}
 #else
-	compiler->context->report_error("Cross-compilation related option used on NONE backend which only supports reflection.");
+	compiler->context->report_error("Enabled extensions can only be queried on GLSL backend.");
 	return nullptr;
 #endif
 }
diff --git a/spirv_glsl.cpp b/spirv_glsl.cpp
index c01b533f..281d4faa 100644
--- a/spirv_glsl.cpp
+++ b/spirv_glsl.cpp
@@ -15565,7 +15565,8 @@ void CompilerGLSL::require_extension(const std::string &ext)
 		forced_extensions.push_back(ext);
 }
 
-const SmallVector<std::string> &CompilerGLSL::get_required_extensions() const {
+const SmallVector<std::string> &CompilerGLSL::get_required_extensions() const
+{
 	return forced_extensions;
 }
 
diff --git a/tests-other/c_api_test.c b/tests-other/c_api_test.c
index e3fda2ef..81853e44 100644
--- a/tests-other/c_api_test.c
+++ b/tests-other/c_api_test.c
@@ -176,14 +176,16 @@ int main(int argc, char **argv)
 	SPVC_CHECKED_CALL(spvc_compiler_create_compiler_options(compiler_glsl, &options));
 	SPVC_CHECKED_CALL(spvc_compiler_install_compiler_options(compiler_glsl, options));
 
-	const int NUM_EXTS = 2;
-	const char* expected_exts[NUM_EXTS] = {
+	static const int NUM_EXTS = 2;
+	const char *expected_exts[NUM_EXTS] =
+	{
 		"EXT_first",
 		"EXT_second"
 	};
 
 	int ext_idx = 0;
-	while(ext_idx < NUM_EXTS) {
+	while (ext_idx < NUM_EXTS)
+	{
 		SPVC_CHECKED_CALL(spvc_compiler_require_extension(compiler_glsl, expected_exts[ext_idx]));
 		ext_idx += 1;
 	}
@@ -204,9 +206,11 @@ int main(int argc, char **argv)
 	}
 
 	ext_idx = 0;
-	while(ext_idx < num_exts) {
-		const char* ext = spvc_compiler_get_required_extension(compiler_glsl, ext_idx);
-		if(strcmp(ext, expected_exts[ext_idx]) != 0) {
+	while (ext_idx < num_exts)
+	{
+		const char *ext = spvc_compiler_get_required_extension(compiler_glsl, ext_idx);
+		if (strcmp(ext, expected_exts[ext_idx]) != 0)
+		{
 			fprintf(stderr, "extension mismatch (%s != %s)!\n", ext, expected_exts[ext_idx]);
 			return 1;
 		}