diff --git a/src/engine/Tuning.v3 b/src/engine/Tuning.v3
index ca6200375..4ecd590e2 100644
--- a/src/engine/Tuning.v3
+++ b/src/engine/Tuning.v3
@@ -63,7 +63,8 @@ component SpcTuning {
 	var inlineWhammProbes = true;		// inline whamm probe functions
 	var maxInlineBytecodeSize = 100;	// max bytecode size to inline
 	var maxInlineParams = 10;		// max parameters to inline
-	var maxInlineDepth = 0;			// max inlining nesting depth
+	var maxInlineDepth = 0;			// max inlining nesting depth for regular (non-fast) functions
+	var maxFastInlineDepth = 0;		// max inlining nesting depth for fast functions
 	def probeCallFreesRegs = true;		// probe calls frees registers in abstract state
 	def runtimeCallFreesRegs = true;	// runtime calls frees registers in abstract state
 	var intrinsifyMemoryProbes = true;
diff --git a/src/engine/compiler/CompilerOptions.v3 b/src/engine/compiler/CompilerOptions.v3
index 55c27f540..7b9ae7329 100644
--- a/src/engine/compiler/CompilerOptions.v3
+++ b/src/engine/compiler/CompilerOptions.v3
@@ -35,6 +35,8 @@ component CompilerOptions {
 			.onSet(fun v => void(SpcTuning.maxInlineParams = v));
 		group.newIntOption("inline-max-depth", SpcTuning.maxInlineDepth, "Maximum inlining nesting depth.")
 			.onSet(fun v => void(SpcTuning.maxInlineDepth = v));
+		group.newIntOption("fast-inline-max-depth", SpcTuning.maxFastInlineDepth, "Maximum inlining nesting depth for fast functions.")
+			.onSet(fun v => void(SpcTuning.maxFastInlineDepth = v));
 	}
 
 	def printHelp(out: TraceBuilder) {