diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05263b2..4a465d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 option(SMATH_BUILD_EXAMPLES "Build example programs" ON)
 option(SMATH_BUILD_TESTS "Build unit tests" ON)
 option(SMATH_BUILD_MODULES "Enable C++20 modules support" OFF)
+option(SMATH_ENABLE_LEGACY_HEADER "Install legacy include <smath.hpp> shim" OFF)
 
 if(SMATH_BUILD_MODULES)
 	message(STATUS "Building smath C++ module")
@@ -17,6 +18,7 @@ add_library(smath INTERFACE)
 target_include_directories(smath
 	INTERFACE
 		$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+		$<$<BOOL:${SMATH_ENABLE_LEGACY_HEADER}>:$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>>
 		$<INSTALL_INTERFACE:include>
 )
 add_library(smath::smath ALIAS smath)
@@ -27,6 +29,16 @@ install(TARGETS smath
 )
 install(DIRECTORY include/ DESTINATION include)
 
+if(SMATH_ENABLE_LEGACY_HEADER)
+	file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/include")
+	configure_file(
+		"${CMAKE_CURRENT_SOURCE_DIR}/cmake/smath_legacy_header.hpp.in"
+		"${CMAKE_CURRENT_BINARY_DIR}/include/smath.hpp"
+		@ONLY
+	)
+	install(FILES "${CMAKE_CURRENT_BINARY_DIR}/include/smath.hpp" DESTINATION include)
+endif()
+
 install(EXPORT smathTargets
 	NAMESPACE smath::
 	FILE smathTargets.cmake
@@ -96,4 +108,3 @@ if(SMATH_BUILD_TESTS)
 	include(GoogleTest)
 	gtest_discover_tests(smath_tests)
 endif()
-
diff --git a/cmake/smath_legacy_header.hpp.in b/cmake/smath_legacy_header.hpp.in
new file mode 100644
index 0000000..46cf641
--- /dev/null
+++ b/cmake/smath_legacy_header.hpp.in
@@ -0,0 +1,3 @@
+#pragma once
+
+#include <smath/smath.hpp>
diff --git a/examples/projection.cpp b/examples/projection.cpp
index 7621b60..afad5f8 100644
--- a/examples/projection.cpp
+++ b/examples/projection.cpp
@@ -10,7 +10,7 @@
 #include <Windows.h>
 #endif
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 using smath::Vec2;
 
 enum Color : uint8_t
diff --git a/examples/random_steps.cpp b/examples/random_steps.cpp
index c0b4d1c..6c7a3b2 100644
--- a/examples/random_steps.cpp
+++ b/examples/random_steps.cpp
@@ -22,7 +22,7 @@
 #include <print>
 #include <random>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 auto main() -> int
 {
diff --git a/examples/tour.cpp b/examples/tour.cpp
index 2e577ee..f844aae 100644
--- a/examples/tour.cpp
+++ b/examples/tour.cpp
@@ -17,7 +17,7 @@
 
 // #define SMATH_IMPLICIT_CONVERSIONS
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 int main()
 {
diff --git a/flake.nix b/flake.nix
index 3126772..40d9f94 100644
--- a/flake.nix
+++ b/flake.nix
@@ -57,8 +57,8 @@
 
           installPhase = ''
             runHook preInstall
-            mkdir -p $out/include
-            cp ../include/smath.hpp $out/include/
+            mkdir -p $out/include/smath
+            cp ../include/smath/smath.hpp $out/include/smath/
             runHook postInstall
           '';
 
diff --git a/include/smath.hpp b/include/smath/smath.hpp
similarity index 100%
rename from include/smath.hpp
rename to include/smath/smath.hpp
diff --git a/src/modules/smath.cppm b/src/modules/smath.cppm
index 5a44a25..2973f2a 100644
--- a/src/modules/smath.cppm
+++ b/src/modules/smath.cppm
@@ -1,6 +1,6 @@
 module;
 
-#include "smath.hpp"
+#include "smath/smath.hpp"
 
 export module smath;
 
diff --git a/tests/angles.cpp b/tests/angles.cpp
index 6453a4e..c47c3e1 100644
--- a/tests/angles.cpp
+++ b/tests/angles.cpp
@@ -1,6 +1,6 @@
 #include <gtest/gtest.h>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 TEST(AngleReturnRadians, DegInput)
 {
diff --git a/tests/interop.cpp b/tests/interop.cpp
index d7dc2e9..071b3d1 100644
--- a/tests/interop.cpp
+++ b/tests/interop.cpp
@@ -2,7 +2,7 @@
 
 #include <gtest/gtest.h>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 struct ExternalVec3f
 {
diff --git a/tests/vec.cpp b/tests/vec.cpp
index ce23ce5..ddffa16 100644
--- a/tests/vec.cpp
+++ b/tests/vec.cpp
@@ -4,7 +4,7 @@
 
 #include <gtest/gtest.h>
 
-#include <smath.hpp>
+#include <smath/smath.hpp>
 
 using smath::Vec;
 using smath::Vec2;