diff --git a/dna/JIT.c b/dna/JIT.c
index 34227bd..4c11145 100644
--- a/dna/JIT.c
+++ b/dna/JIT.c
@@ -806,6 +806,12 @@
 				} else if (pTypeA->stackType == EVALSTACK_INT64) {
 					PushOp(JIT_NEG_I64 + (op - CIL_NEG));
 					PushStackType(types[TYPE_SYSTEM_INT64]);
+				} else if (pTypeA->stackType == EVALSTACK_F32) {
+					PushOp(JIT_NEG_F32);
+					PushStackType(types[TYPE_SYSTEM_SINGLE]);
+				} else if (pTypeA->stackType == EVALSTACK_F64) {
+					PushOp(JIT_NEG_F64);
+					PushStackType(types[TYPE_SYSTEM_DOUBLE]);
 				} else {
 					Crash("JITit(): Cannot perform unary operand on stack types: %d", pTypeA->stackType);
 				}
diff --git a/dna/JIT_Execute.c b/dna/JIT_Execute.c
index db7d7e8..24f95a4 100644
--- a/dna/JIT_Execute.c
+++ b/dna/JIT_Execute.c
@@ -415,6 +415,8 @@
 		GET_LABELS_DYNAMIC(JIT_NOT_I32, 0);
 		GET_LABELS_DYNAMIC(JIT_NEG_I64, 0);
 		GET_LABELS_DYNAMIC(JIT_NOT_I64, 0);
+		GET_LABELS_DYNAMIC(JIT_NEG_F32, 0);
+		GET_LABELS_DYNAMIC(JIT_NEG_F64, 0);
 
 		GET_LABELS(JIT_BOX_NULLABLE);
 		GET_LABELS_DYNAMIC(JIT_LOAD_F64, 8);
@@ -2021,6 +2023,18 @@
 JIT_NEG_I64_end:
 	GO_NEXT();
 
+JIT_NEG_F32_start:
+	OPCODE_USE(JIT_NEG_F32);
+	UNARY_OP(float, -);
+JIT_NEG_F32_end:
+	GO_NEXT();
+
+JIT_NEG_F64_start:
+	OPCODE_USE(JIT_NEG_F64);
+	UNARY_OP(double, -);
+JIT_NEG_F64_end:
+	GO_NEXT();
+
 JIT_NOT_I32_start:
 	OPCODE_USE(JIT_NOT_I32);
 	UNARY_OP(U32, ~);
diff --git a/dna/JIT_OpCodes.h b/dna/JIT_OpCodes.h
index 6b08da1..03ed018 100644
--- a/dna/JIT_OpCodes.h
+++ b/dna/JIT_OpCodes.h
@@ -199,6 +199,8 @@
 #define JIT_NOT_I32				0x8b
 #define JIT_NEG_I64				0x8c
 #define JIT_NOT_I64				0x8d
+#define JIT_NEG_F32				0x1Fc
+#define JIT_NEG_F64				0x1Fd
 
 #define JIT_BOX_NULLABLE		0x8e
 #define JIT_LOAD_F64			0x8f