diff --git a/Makefile b/Makefile
index 78146f1..ac788c9 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,7 @@ INCLUDE=include
 INCLUDE_INTERNAL=src/internal
 
 COMMON_FLAGS= -W -Wall -Wextra -Wstrict-aliasing -fno-strict-aliasing "-D_VERSION=$(VERSION)" $(addprefix -I,$(INCLUDE)) $(addprefix -I,$(INCLUDE_INTERNAL))
+COMMON_FLAGS+=-D_RNGXX_IMPL
 
 TARGET_CPU?=native
 OPT_FLAGS?= $(addprefix -march=,$(TARGET_CPU)) -fgraphite -fopenmp -floop-parallelize-all -ftree-parallelize-loops=4 \
diff --git a/include/rngxx.h b/include/rngxx.h
index 478fb2d..df02715 100644
--- a/include/rngxx.h
+++ b/include/rngxx.h
@@ -6,7 +6,13 @@
 
 #include <climits>
 
+#ifndef _RNGXX_IMPL
+#define _RNGXX_COMMON_MINIMAL
+#endif
 #include "rngxx/common.h"
+#ifndef _RNGXX_IMPL
+#undef _RNGXX_COMMON_MINIMAL
+#endif
 
 #define CTOR_COPY(name) name(const name& copy)
 #define CTOR_MOVE(name) name(name&& move)
@@ -178,13 +184,9 @@ protected:
 	// It is recommended to override `next_bytes()` too however.
 	virtual f64 _sample() = 0;
 
-	inline f64 sample() 
-	{
-		auto s = _sample();
-		if (UNLIKELY(s < 0 || s > 1)) throw InvalidRandomSample{ s };
-		return s;
-	}
-private:
+	f64 sample();
+
+	private:
 	template<usize N>
 	inline void _next_bytes(u8* a)
 	{
diff --git a/include/rngxx/common.h b/include/rngxx/common.h
index cc49478..076db3c 100644
--- a/include/rngxx/common.h
+++ b/include/rngxx/common.h
@@ -7,6 +7,8 @@ extern "C" {
 
 #include <stdint.h>
 #include <stddef.h>
+
+#ifndef _RNGXX_COMMON_MINIMAL
 #include <stdlib.h>
 
 #define IFUNC_NAME(name, ver) _impl__ ## name ## __ ## ver 
@@ -32,6 +34,8 @@ extern "C" {
 
 #define _rng_internal v_internal
 
+#endif
+
 #define DEF(s, n) typedef s ## int ## n ## _t s ## n
 #define DEFINT(n) typedef uint ## n ## _t u ## n; \
 		  typedef int ## n ## _t i ## n
@@ -41,6 +45,7 @@ DEFINT(16);
 DEFINT(32);
 DEFINT(64);
 
+
 #ifdef __cplusplus
 #else
 #include <stdbool.h>
@@ -65,7 +70,9 @@ typedef uintptr_t ptr_t;
 #undef DEF
 
 #ifdef __cplusplus
+#ifndef _RNGXX_COMMON_MINIMAL
 #define restrict __restrict__
+#endif
 }
 #endif
 
diff --git a/src/rng.cpp b/src/rng.cpp
index 333ede1..80b9d4d 100644
--- a/src/rng.cpp
+++ b/src/rng.cpp
@@ -30,6 +30,15 @@ N_INTS
 #undef NEXTT
 #undef NEXT
 
+f64 Random::sample()
+{
+	auto s = _sample();
+	if (UNLIKELY(s < 0 || s > 1)) throw InvalidRandomSample{ s };
+	return s;
+}
+
+
+
 // Inefficient sample() based impl of `bytes()`
 void Random::next_bytes(u8* ptr, usize n)
 {