diff --git a/Cargo.toml b/Cargo.toml
index fdbf8216a8..5b06a4275c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ bitflags = "1"
 bit-set = "0.5"
 codespan-reporting = { version = "0.11.0", optional = true }
 rustc-hash = "1.1.0"
-indexmap = "1.6" # 1.7 has MSRV 1.49
+indexmap = "~1.6" # 1.7 has MSRV 1.49
 log = "0.4"
 num-traits = "0.2"
 spirv = { version = "0.2", optional = true }
diff --git a/src/back/spv/block.rs b/src/back/spv/block.rs
index 64eaadcc9c..02f441885c 100644
--- a/src/back/spv/block.rs
+++ b/src/back/spv/block.rs
@@ -390,7 +390,7 @@ impl<'w> BlockContext<'w> {
                     crate::BinaryOperator::Modulo => match left_ty_inner.scalar_kind() {
                         Some(crate::ScalarKind::Sint) => spirv::Op::SMod,
                         Some(crate::ScalarKind::Uint) => spirv::Op::UMod,
-                        Some(crate::ScalarKind::Float) => spirv::Op::FMod,
+                        Some(crate::ScalarKind::Float) => spirv::Op::FRem,
                         _ => unimplemented!(),
                     },
                     crate::BinaryOperator::Equal => match left_ty_inner.scalar_kind() {
diff --git a/tests/out/spv/operators.spvasm b/tests/out/spv/operators.spvasm
index 0b8ee6e965..514e9bfb8e 100644
--- a/tests/out/spv/operators.spvasm
+++ b/tests/out/spv/operators.spvasm
@@ -149,13 +149,13 @@ OpFunctionEnd
 OpBranch %118
 %118 = OpLabel
 %119 = OpSMod  %8  %7 %7
-%120 = OpFMod  %4  %3 %3
+%120 = OpFRem  %4  %3 %3
 %122 = OpCompositeConstruct  %121  %7 %7 %7
 %123 = OpCompositeConstruct  %121  %7 %7 %7
 %124 = OpSMod  %121  %122 %123
 %125 = OpCompositeConstruct  %22  %3 %3 %3
 %126 = OpCompositeConstruct  %22  %3 %3 %3
-%127 = OpFMod  %22  %125 %126
+%127 = OpFRem  %22  %125 %126
 OpReturn
 OpFunctionEnd
 %129 = OpFunction  %2  None %117